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Why are women more likely to develop Alzheimer’s disease?

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Did you know that of the 6.2 million people with Alzheimer’s disease who are age 65 or older in this country, almost two-thirds are women? This means that Alzheimer’s disease is almost twice as common in women compared to men. Why is Alzheimer’s disease more common in women?

Women live longer

The first and most important reason is that women tend to live longer than men. If you look at actuarial life tables, you can see that a baby girl born in 2019 is likely to live five years longer than a baby boy: 81 versus 76 years.

The greatest risk factor for Alzheimer’s disease is age: the older you are, the more likely you are to develop Alzheimer’s disease. For example, out of 1,000 people, the incidence (the number who develop Alzheimer’s each year) depends on age:

  • 4 out of 1,000 people ages 65 to 74 develop Alzheimer’s each year
  • 32 out of 1,000 people ages 75 to 84 develop Alzheimer’s each year
  • 76 out of 1,000 people ages 85 and older develop Alzheimer’s each year.

So, one reason that there are more women with Alzheimer’s disease than men is simply that there are more older women than older men living in our society — 5.7 million more of them — and the older you are, the more likely you are to develop Alzheimer’s disease.

But that’s not the whole answer.

The incidence of Alzheimer’s is greater in women

Your chances of developing Alzheimer’s disease late in life are somewhat greater if you are a woman than a man. One study followed 16,926 people in Sweden and found that, beginning around age 80, women were more likely to be diagnosed with Alzheimer’s disease than men of the same age. Similarly, a study based in Taiwan found that one’s chances of developing Alzheimer’s disease over seven years was greater in women compared to men. And a meta-analysis examining the incidence of Alzheimer’s disease in Europe found that approximately 13 women out of 1,000 developed Alzheimer’s each year, compared to only seven men.

So, women living longer than men cannot be the whole answer as to why women are more likely than men to develop Alzheimer’s disease, because even among individuals who are living and the same age, women are more likely to be diagnosed with Alzheimer’s than men.

The incidence of non-Alzheimer’s dementia is not greater in women

One clue to the answer to this puzzle is that your chances of developing dementia from a cause other than Alzheimer’s disease is not greater if you are a woman. For example, the study examining dementia rates in Sweden found that both women and men were equally likely to develop a non-Alzheimer’s dementia as they aged. That rates of Alzheimer’s disease differ by gender, whereas rates of non-Alzheimer’s dementias do not, suggests that there must be a specific interaction between Alzheimer’s disease and gender.

Amyloid deposition in Alzheimer’s may be fighting infections

Another clue to this puzzle comes from the work of Harvard researchers, who have suggested that amyloid, one component of Alzheimer’s disease pathology, may be deposited in order to fight off infections in the brain. If their suggestion turns out to be correct, we might think of Alzheimer’s disease as a byproduct of our brain’s immune system.

Autoimmune disorders are more common in women

The last piece of the puzzle is that women are about twice as likely to have an autoimmune disease compared to men. The reason for this difference is not entirely clear, but it is clear that the immune system is generally stronger in women than men, and many autoimmune diseases are more common during pregnancy. It may be that women’s stronger immune system developed through evolution to protect the fetus from infections. So, as part of their stronger immune systems, women may end up having more amyloid plaques than men.

Putting the pieces together

By combining all of this information, one possible explanation as to why women’s risk of Alzheimer’s disease is greater than men’s — in addition to women living longer — is:

  • The amyloid plaques that cause Alzheimer’s disease may be part of the brain’s immune system to fight against infections.
  • Women have stronger immune systems than men.
  • As part of their stronger immune systems, women may end up having more amyloid plaques than men.
  • Because they may have more amyloid plaques than men, this theory may explain why women end up having a greater risk of developing Alzheimer’s disease.

Please note the italicized words "may" that I have used. Although the ideas I have presented here are logical, coherent, and form the basis of a good theory, they have not yet been proven to be correct. More research is needed!

The bottom line

You are more likely to develop Alzheimer’s disease over your lifetime if you are a woman, because women live longer than men and, possibly, because women have stronger immune systems compared to men.

Does that mean that if you’re a woman, you’re more likely to develop Alzheimer’s disease and there’s nothing you can do about it? Not at all! You can do many things to reduce your risk of Alzheimer’s today.

  • Engage in aerobic exercise such as brisk walking, jogging, biking, swimming, or aerobic classes at least 30 minutes per day, five days per week.
  • Eat a Mediterranean menu of foods including fish, olive oil, avocados, fruits, vegetables, nuts, beans, whole grains, and poultry. Eat other foods sparingly.
  • Sleep well — and clean those Alzheimer’s plaques out of your brain.
  • Participate in social activities and novel, cognitively stimulating activities.

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New study investigates treatment-associated regrets in prostate cancer

Men who are newly diagnosed with prostate cancer have difficult choices to make about medical therapy, and the last thing any of them want is to regret their treatment decisions later. But unfortunately, treatment-related regrets are quite common, according to a new study.

After looking into the experiences of 2,072 men diagnosed with prostate cancer between 2011 and 2012, the investigators found that more than one in 10 were unhappy with their chosen treatment.

The men were all younger than 80, with an average age of 64. Nearly half of them had slow-growing cancers with a low risk of recurrence or spread after treatment. The rest were in intermediate- or higher-risk categories.

All the men were treated in one of three different ways: surgery to remove the prostate (a procedure called radical prostatectomy); radiation therapy; or active surveillance, which entails monitoring prostate tumors with routine PSA checks and imaging, and treating only when, or if, the cancer progresses. More than half the men chose surgery regardless of their cancer risk at the time of diagnosis. Most of the others chose radiation, and about 13% of the men — the majority of them in low- or intermediate-risk categories — chose active surveillance. Then, at periodic intervals afterwards, the men filled out questionnaires asking if they felt they might have been better off with a different approach, or if the treatment they had chosen was the wrong one.

What the results showed

Results showed that after five years, 279 of the men (13% of the entire group) had regrets about what they had chosen. The surgically-treated men were most likely to voice unhappiness with their decision; 183 of them (13%) felt they would have been better off with a different approach. By contrast, regrets were expressed by 76 (11%) of the radiation-treated men and 20 (7%) of men who chose active surveillance. Men in the low-to intermediate-risk categories were more likely to regret having chosen immediate treatment with surgery or radiation instead of active surveillance. The men with high-risk cancer, however, did not regret being treated immediately.

The study was led by Dr. Christopher Wallis, a urologic oncologist at Mount Sinai Hospital in Toronto, Canada. Wallis and his team didn’t explore which specific disease outcomes or complications led to the regrets associated with particular treatments. However, the study did find that sexual dysfunction was significantly associated with treatment regrets in general. “And patients on active surveillance may develop regret if their disease progresses and they then come to believe that they may have been better suited by getting treatment earlier,” Wallis wrote in an email.

The study’s key finding, according to the investigators, is that regrets arise from discrepancies between what men expect from a particular approach and their actual experiences over time. “That’s the important take-away,” Wallis said.

In an accompanying editorial, Randy Jones, PhD., RN, a professor at the University of Virginia School of Nursing, emphasized that improved treatment counseling at the time of diagnosis can help to minimize the likelihood of regret later. This communication, he wrote, should consider the patient’s personal values, stress shared decision-making between patients and doctors, and aim for an “understanding of realistic expectations and adverse effects that are possible during treatment.”

“This study underscores the importance of not rushing into a decision, and fully understanding the time course of side effects and what can be expected from them,” said Dr. Marc Garnick, the Gorman Brothers Professor of Medicine at Harvard Medical School and Beth Israel Deaconess Medical Center, editor of the Harvard Health Publishing Annual Report on Prostate Diseases, and editor in chief of HarvardProstateKnowledge.org. “Only when these consequences of treatment(s) or surveillance are fully understood is the patient able to make a truly informed decision.” All too often, newly diagnosed patients respond by “wanting to take care of this as soon as emergently possible.” But with prostate cancer, patients have the time to fully understand what is at stake. “I urge my patients to speak with members of prostate support groups and other prostate cancer patients about the issues they are likely to face, not necessarily in the immediate future, but years later. The fact that this study evaluated individuals 10+ years following their decision is an important feature in helping us better understand the time course during which regrets may be experienced.”

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Tinnitus: Ringing or humming in your ears? Sound therapy is one option

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That recurring sound that you hear but nobody else does? It’s not all in your head. Well, not exactly.

You may be one of the estimated 50 million-plus people who suffer from tinnitus. The mysterious condition causes a sound in the head with no external source. For many it’s a high-pitched ringing, while for others it’s whistling, whooshing, buzzing, chirping, hissing, humming, roaring, or even shrieking.

The sound may seem to come from one ear or both, from inside the head, or from a distance. It may be constant or intermittent, steady or pulsating. One approach to managing this condition is different forms of sound therapy intended to help people tune out the internal soundtrack of tinnitus.

What causes tinnitus?

There are many possible causes of tinnitus. Long-term exposure to loud noises is often blamed. But other sources include middle ear problems like an infection, a tumor or cyst pinching nerves in the ear, or something as simple as earwax buildup. Tinnitus also can be a symptom of Meniere’s disease, a disorder of the balance mechanism in the inner ear.

Even old-fashioned aging can lead to tinnitus, which is common in people older than age 55. As people get older, the auditory nerve connecting the ear to the brain starts to fray, diminishing normal sounds.

“Neurons (nerve cells) in areas of the brain that process sound make up for this loss of input by increasing their sensitivity,” says Daniel Polley, director of the Lauer Tinnitus Research Center at Harvard-affiliated Massachusetts Eye and Ear. “The sensitivity knobs are turned up so high that neurons begin to respond to the activity of other nearby neurons. This creates the perception of a sound that does not exist in the physical environment. It’s a classic example of a feedback loop, similar to the squeal of a microphone when it is too close to a speaker.”

At times, everyone experiences the perception of a phantom sound. If it only lasts for a few seconds or minutes, it’s nothing to worry about. However, if it pulsates in sync with your heart rate, it’s definitely something to get checked out by a physician, says Polley. If it’s a relatively continuous sound, you should see an audiologist or otolaryngologist (ears, nose, throat specialist).

Can sound therapy help tune out tinnitus?

There is no cure for tinnitus, but it can become less noticeable over time. Still, there are ways to ease symptoms and help tune out the noise and minimize its impact. Treatments are a trial-and-error approach, as they work for some people but not others.

One often-suggested strategy is sound therapy. It uses external noise to alter your perception of or reaction to tinnitus. Research suggests sound therapy can effectively suppress tinnitus in some people. Two common types of sound therapy are masking and habituation.

  • Masking. This exposes a person to background noise, like white noise, nature sounds, or ambient sounds, to mask tinnitus noise or distract attention away from it. Listening to sound machines or music through headphones or other devices can offer temporary breaks from the perception of tinnitus. Household items like electric fans, radios, and TVs also can help. Many people with tinnitus also have some degree of hearing loss. Hearing aids can be used to mask tinnitus by turning up the volume on outside noises. This works especially well when hearing loss and tinnitus occur within the same frequency range, according to the American Tinnitus Association.
  • Habituation. Also known as tinnitus retraining therapy, this process trains your brain to become more accustomed to tinnitus. Here, you listen to noise similar to your tinnitus sound for long periods. Eventually your brain ignores the tone, along with the tinnitus sound. It’s similar to how you eventually don’t think about how glasses feel on your nose. The therapy is done with guidance from a specialist and the time frame varies per person, usually anywhere from 12 to 24 months.

Additional approaches may help with tinnitus

Depending on your diagnosis, your doctor also may recommend addressing issues that could contribute to your tinnitus.

  • Musculoskeletal factors. Jaw clenching, tooth grinding, prior injury, or muscle tension in the neck can sometimes make tinnitus more noticeable. If tight muscles are part of the problem, massage therapy may help relieve it.
  • Underlying health conditions. You may be able to reduce the impact of tinnitus by treating conditions like depression, anxiety, and insomnia.
  • Negative thinking. Adopting cognitive behavioral therapy and hypnosis to redirect negative thoughts and emotions linked to tinnitus may also help ease symptoms.
  • Medication. Tinnitus can be a side effect of many medications, especially when taken at higher doses, like aspirin and other nonsteroidal anti-inflammatory drugs and certain antidepressants. The problem often goes away when the drug is reduced or discontinued.

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Making holiday shopping decisions quicker and with less stress

When faced with buying shoes, some people will be done in five minutes and be totally satisfied. For others, it’ll be a multiday process of reading reviews, comparing prices, consideration, and more consideration before making a decision.

Or not.

People can want to make a choice, but fear of making a bad one or of missing a better deal that might come gets in the way. The upcoming holiday gift-buying only ups the pressure.

“Making decisions is a taxing task,” says Dr. Soo Jeong Youn, clinical psychologist at Massachusetts General Hospital and assistant professor in the department of psychiatry at Harvard Medical School.

We’re doing it constantly, with what to wear and eat. It can also feel agonizing, even paralyzing, because sometimes we don’t know all the information, and so the brain fills in the gaps with worst-case scenarios, which does nothing to lower the stress.

Can we get better at making decisions? The short answer is yes. It takes some organization, but also a mindset shift in which we accept that there is no ideal choice. But before that, it helps to look a little more at why decision-making can be so difficult.

Knowing what to expect

Not all decisions cause the same stress. Big ones, like changing jobs or buying a house, take consideration, which we expect. Everyday choices, like our morning coffee order or groceries, are often automatic. And usually, the prefrontal cortex is in control. That’s the part of the brain behind the forehead, handling executive functioning skills — a term, Youn says, which tries to capture the complexity behind thinking. The prefrontal cortex processes information from the entire brain and puts it together to make a choice.

It’s the midlevel decisions — the new bike, winter jacket, toaster, or shoes — that become troublesome. They’re not huge purchases, but since we don’t make them regularly, we can spend more time weighing cost versus benefit. “We haven’t engaged in the thinking process,” Youn says.

Instead of the prefrontal cortex, the limbic system takes over. It’s the fight-or-flight response part of the brain, and there’s no careful weighing of factors. The goal is simple: survival, and it can cause us to make a less-than-optimal choice just to end the decision-making process — or to avoid the situation altogether by doing nothing, she says.

That’s not necessarily our goal. We want to make a good choice, but often there’s more in play, namely expectations. It’s tied into how we get viewed and what our worth is. If it’s a present, we worry about whether it expresses our feelings appropriately. As Youn says, “That decision is not just about that decision.”

And underlying it all is the fear and regret that you picked the wrong thing.

But to that, Youn poses a question: Wrong for what?

Get your focus

Often, people go into a purchase without being clear on what they need. Is the item for warmth, durability, exercise, style? Does it have to have special features? Do you need it quickly? Establishing a scope gives us something to refer back to and ask, “Does this fit with my purpose?” Conversely, with no parameters, we spend more time and angst making decisions, and sometimes keep looking under the belief that the “perfect” thing exists.

“We want this to check off all the boxes, even though we haven’t defined what all the boxes are,” she says.

For some people, the difficulty is in making the decision, but once done, the stress is over. But for others, the worry continues: the limbic system is still activated, and that’s when regret or buyer’s remorse comes in. Youn says to treat it like that song in your head that won’t go away, and give it some attention.

Examine the worry and name it. If you’re wondering about missing out on something, ask, “Why is that important?” And then with every assumption ask, “And then what would happen?” The process might reduce the magnitude of how much something actually matters. If that doesn’t work and you’re worried that you missed out on a better deal, then do some research. Whatever the result, even if it wasn’t in your favor, take it as a lesson that you can use for the next decision.

Lean on routines

New decisions take energy. That’s why routines are helpful — they remove the uncertainty of what to do in the morning or how to get to work. When possible, Youn says, use previous knowledge instead of constantly reinventing the wheel. If you like a pair of sneakers, there’s no problem with rebuying them if your needs haven’t changed.

If they have, just re-examine the new components, not the stuff you already know. And if you feel like you’re getting stuck in the evaluation process, ask yourself, “Is this worth my time?” The question creates a pause, brings you back into the moment, and allows you to decide how you want to proceed.

More research won’t help with decision-making or decision regret

It helps to realize that when we do our research, there comes a point where we’ve seen everything. In fact, more information becomes overload. What helps is to shrink down options as soon as possible. Maybe start with 10, but quickly get to five, then three, and finally two to compare before picking the winner. What can also help is setting the timer on your phone and giving yourself a certain number of minutes to make a choice. Sometimes that self-imposed deadline can keep us on track, and we can move on to the next decision.

But there can always be a nagging feeling that there’s more to know. In reality there isn’t, and actually we can’t know everything and don’t have to know everything — and that’s all right. As Youn says, “It’s an illusion.”

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Thinking of trying Dry January? Steps for success

Let’s file this under unsurprising news: many American adults report drinking more since the pandemic began in March 2020, according to a survey on alcohol use in the time of COVID-19. If you’re among them, you might want to start 2022 on a healthy note by joining the millions who abstain from alcohol during Dry January. Your heart, liver, memory, and more could be the better for it.

What did this survey find?

The researchers asked 832 individuals across the US about their alcohol intake over a typical 30-day period. Participants reported drinking alcohol on 12.2 days and consuming almost 27 alcoholic drinks during that time. More than one-third reported engaging in binge drinking (consuming five or more drinks for men and four or more drinks for women in about two hours).

Moreover, nearly two-thirds of the participants said their drinking had increased compared to their consumption rates before COVID. Their reasons? Higher stress, more alcohol availability, and boredom.

But we can’t blame COVID entirely for the recent rise in alcohol consumption. Even before the pandemic, alcohol use among older adults had been trending upward.

Why try Dry January?

If you recognize your own behavior in this survey and wish to cut down on your alcohol intake, or simply want to begin the new year with a clean slate, join in the Dry January challenge by choosing not to drink beer, wine, or spirits for one month. Dry January began in 2012 as a public health initiative from Alcohol Change UK, a British charity. Now millions take part in this health challenge every year.

While drinking a moderate amount of alcohol is associated with health benefits for some people in observational studies, heavier drinking and long-term drinking can increase physical and mental problems, especially among older adults. Heart and liver damage, a higher cancer risk, a weakened immune system, memory issues, and mood disorders are common issues.

Yet, cutting out alcohol for even a month can make a noticeable difference in your health. Regular drinkers who abstained from alcohol for 30 days slept better, had more energy, and lost weight, according to a study in BMJ Open. They also lowered their blood pressure and cholesterol levels and reduced cancer-related proteins in their blood.

Tips for a successful Dry January

A month may seem like a long time, but most people can be successful. Still, you may need assistance to stay dry in January. Here are some tips:

  • Find a substitute non-alcoholic drink. For social situations, or when you crave a cocktail after a long day, reach for alcohol-free beverages like sparkling water, soda, or virgin beverages (non-alcoholic versions of alcoholic drinks.)

    Non-alcoholic beer or wine also is an option, but some brands still contain up to 0.5% alcohol by volume, so check the label. "Sugar is often added to these beverages to improve the taste, so try to choose ones that are low in sugar," says Dawn Sugarman, a research psychologist at Harvard-affiliated McLean Hospital in the division of alcohol, drugs, and addiction.

  • Avoid temptations. Keep alcohol out of your house. When you are invited to someone’s home, bring your non-alcoholic drinks with you.
  • Create a support group. Let friends and family know about your intentions and encourage them to keep you accountable. Better yet, enlist someone to do the challenge with you.
  • Use the Try Dry app. This free app helps you track your drinking, set personal goals, and offers motivational information like calories and money saved from not drinking. It’s aimed at cutting back on or cutting out alcohol, depending on your choices.
  • Don’t give up. If you slip up, don't feel guilty. Just begin again the next day.

Check your feelings

Sugarman recommends people also use Dry January to reflect on their drinking habits. It’s common for people to lose their alcohol cravings and realize drinking need not occupy such an ample space in their lives. If this is you, consider continuing for another 30 days, or just embrace your new attitude toward drinking where it’s an occasional indulgence.

If you struggle during the month, or give up after a week or so, you may need extra help cutting back. An excellent resource is the Rethinking Drinking site created by the National Institute on Alcohol Abuse and Alcoholism (NIAAA). For the record, NIAAA recommends limiting alcohol to two daily drinks or less for men and no more than one drink a day for women.

Be aware of problems that might crop up

Dry January can reveal potential alcohol problems, including symptoms of alcohol withdrawal ranging from mild to serious, depending on how much you usually drink. Mild symptoms include anxiety, shaky hands, headache, nausea, vomiting, sweating, and insomnia. Severe symptoms often kick in within two or three days after you stop drinking. They can include hallucinations, delirium, racing heart rate, and fever. "If you suffer alcohol withdrawal symptoms at any time, you should seek immediate medical help," says Sugarman.

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Waiting for motivation to strike? Try rethinking that

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All of us know that motivation is a key ingredient to accomplishing goals in our personal and professional lives. But if you wait for motivation to strike like a sudden lightning storm, you’re a lot less likely to take a single step toward any goal. Even if you have a much-desired goal in mind, it’s all too easy to deplete motivation through feeling overwhelmed, procrastination, or impatience. The steps below can help you increase your motivation to accomplish the goals that matter to you.

The meaning of your goal

Before setting a goal, it is critical to clearly identify meaning — that is, why is successfully reaching this goal important to you? What will this achievement mean to you? For example, telling yourself “I want to lose 10 pounds so I have more energy to play with my grandchildren” conveys far more meaning than “I want to lose weight.” Or maybe your goal is to paint a room a different color because you feel that color will bring more joy into your life. That’s very different than setting a goal of “paint room.”

If you set a goal and find yourself procrastinating or not achieving it, revisit the meaning of the goal you have set. Is this a goal that continues to matter to you? If so, consider the meaning behind the procrastination or the difficulties that you are experiencing.

Operationalize your goal

Write out a detailed plan to achieve the goal. Use the SMART acronym to guide this plan:

  • Specific (What exactly do you want to accomplish?)
  • Measurable (How will you know when you have succeeded?)
  • Achievable (Is the goal you have set possible?)
  • Realistic (Does setting this goal make sense for you right now?)
  • Time-bound (What is the specific time frame to accomplish this goal?)

For example, a goal of “exercise more” is too vague, and will not set you up for success. Instead, set a goal of walking 50 steps in the next hour, or taking a 15-minute walk Wednesday morning. This goal is specific, measurable, achievable, realistic, and time-bound.

Set up a to-do list — and tick it off

Once you identify a specific goal, make a to-do list to accomplish it.

  • What resources do you need?
  • What are the steps you’ll take toward your goal? Break down tasks into manageable mini-tasks and write each one down.
  • Set deadlines for each task. Make a schedule to accomplish these tasks, being sure to include regular breaks and realistic time frames.
  • Cross off each mini-task as you complete it. Step by step, you’ll see you’re making progress toward your goals.

If you are having difficulty breaking down your goal into smaller tasks, just begin working toward it. For example, if you set a goal of increasing the number of steps you walk each day, but have difficulty identifying the ideal number of steps as a goal, just start walking. You can figure out that ideal number later.

Include others

Invite a team to help you with your goal. You could join a running club, or ask family and friends to check on your progress in achieving tasks related to your overall goal. Perhaps friends can send email or text message reminders to keep you accountable. Finally, surround yourself by other people who are actively working on their own goals. Their efforts may inspire you, too.

Visualize success

Create an image of yourself achieving this goal. This image could be in your mind, or perhaps you could draw a picture of yourself achieving your goal. Imagine what achieving this goal will mean for you. How will you experience the success? How will it feel for you? Remember these positive emotions as you are completing the tasks on your to-do list to help fuel motivation.

Avoid distractions

Try to choose a space that is organized, free of clutter, and with minimal distractions. Focus on one task at a time, not multitasking. Close email and place your phone on silent. Avoid social media sites that make goals seem very easy to attain.

Track progress and time spent

Decide how often you’ll track progress toward your overall goal through your to-do list. Are you meeting the timeline you initially established? If not, identify stumbling blocks. Revisit the importance and meaning of this goal and how you initially set up your SMART model. If necessary, reconsider challenging aspects of your goal and make changes in your plan.

Think creatively about how to expand available time to work on your goal. Can you make certain tasks more routine in your life? Can you link unenjoyable tasks with more pleasurable activities? For example, if you dread your goal of taking 100 additional steps each day, could you listen to music or a podcast that you enjoy while you are taking these steps?

Embrace empathy

Be kind to yourself when tracking progress toward achieving your goal. Practice self-compassion on occasions when you fall short. Build small rewards into the process, and consider how to celebrate all your accomplishments.

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4 immune-boosting strategies that count right now

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It’s winter, as a glance outside your window may tell you. COVID-19 is circulating at record levels across much of the country. Keeping our immune systems healthy has taken on new importance, as many of us hope to ward off flu and winter colds as well as worrisome variants of the virus that causes COVID-19, whether Delta or Omicron.

Not surprisingly, marketers are taking advantage of our concerns. A whole cottage industry is devoted to chewables, pills, and powders that claim to “boost” or “support” your immune system. Some people even claim that healthy eating and vigorous workouts are all you truly need to avoid getting sick. But are any of these claims true?

The best strategies for staying healthy

I asked Michael Starnbach, professor of microbiology at Harvard Medical School, for his advice on steps that can help us stay in good health this winter.

“Vaccination, skepticism of any other products claiming immune benefits, and staying away from places without universal masking are the best strategies,” he says. Here’s why these approaches count.

Get vaccinated

When it comes to improving your immune response, getting the COVID vaccine and booster shot, along with other recommended vaccinations, is best. Think of vaccination as a cheat sheet for your immune system. When a viral invader makes its way into your body, your immune system prepares to fight. But first it has to figure out what’s attacking, which takes time — time that allows the virus to keep multiplying inside your body.

A vaccine introduces the immune system to the invader ahead of time and allows it to develop a battle plan. So when the virus does show up at the door, your immune system can react quickly, which may mean no symptoms, or at least preventing serious illness. A booster shot is a refresher course to keep those lessons fresh.

While it is possible to become infected even if you are vaccinated, your immune system is primed to clear the virus more rapidly, so the infection is far less likely be severe or life-threatening. “We should get all available vaccines and boosters so that if we do get infected, we have a better chance of having a mild case,” says Starnbach.

Be skeptical

Any number of vitamin formulations and probiotics claim to boost or support your immune system. And while there is a grain of truth to some of those claims, the big picture is that they often don’t work. For example, vitamins do help immune function, but really only in people who have a vitamin deficiency — not in an average, healthy adult.

Probiotics also hold promise. This mini-universe of organisms living in your gut called the microbiome does play an important role in immunity. But experts don’t know enough about that role to create a product that can manipulate the microbiome to enhance immunity. That may change over the next decade — but for now, view probiotic claims with a healthy dose of skepticism, says Starnbach.

Mask up

Ultimately, nothing is better at keeping you well than avoiding exposure to a virus altogether. Wearing a mask isn’t on anyone’s favorites list, but it can help reduce the risk of spreading COVID (and some other viruses) to people who are unvaccinated, including children who aren’t yet eligible for the shot, and people with immune system deficiencies who don’t get adequate protection from the vaccine, says Starnbach. Masks are most effective when everyone around you is wearing one. “We now know clearly that the best way to prevent the unvaccinated from becoming infected is by indoor mask mandates,” says Starnbach.

Practice good health habits

But what about exercise and good nutrition? Do they have a role in supporting your immune system?

The answer is yes. Strategies to improve your overall health are never wasted. Healthy people are more resistant to disease, and often fare better if they are infected. Good health habits can help your immune system operate at its peak. Exercise and good nutrition aren’t the only habits that can help. You should also try to get consistent, high-quality sleep and manage your stress level. Lack of sleep and chronic stress can impair immune function.

But if you hope to avoid COVID-19 and other viruses, these strategies should come in addition to — not as a substitute for — vaccination and other protective measures.

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Stretching studios: Do you need what they offer?

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Boutique or specialty fitness studios offer all sorts of ways to exercise, such as strength training, indoor cycling, and kickboxing. Other popular options, like yoga and Pilates, are less likely to leave you sweaty and breathless, emphasizing flexibility and measured movement. Now a new trend has emerged: studios that focus solely on stretching. What are these studios offering, and will you benefit from this focus?

What are stretch studios offering?

These studios, which include StretchLab, StretchMed, LYMBYR, and others, provide assisted stretching sessions, either one-on-one or in small groups. The promised benefits range from reasonable goals of increasing flexibility and range of motion to more questionable assertions, such as preventing injuries and eliminating chronic pain.

"If you participate in certain sports that require flexibility, like dance or gymnastics, stretching may be important to maintain range of motion," says Dr. Adam Tenforde, associate professor of physical medicine and rehabilitation at Harvard Medical School, and sports medicine physician at Spaulding Rehabilitation and Mass General Brigham.

But if your focus is on improving your overall health, the evidence to support stretching is sorely lacking — especially compared with the wealth of evidence supporting the benefits of regular, moderate physical activity.

"Contrary to popular belief, there’s no consistent evidence that stretching helps prevent injuries," says Dr. Tenforde. And if you have an existing injury, such as a muscle or joint sprain, aggressively stretching that tissue could actually make the injury worse, he adds.

The "stretch therapists" and "flexologists" at stretching studios may have certain certifications and training, but they’re probably not qualified to recognize and address health-related causes for pain or stiffness. If you have a previous or current musculoskeletal injury, you’re much better off going to a physical therapist who has the expertise and training to treat you correctly.

Feeling tight and stiff?

If you’re free from injuries but just feel tight and stiff, try a yoga class, which can provide added benefits like improving your balance and helping you relax and de-stress. Or consider tai chi, a gentle, meditative form of exercise that can help lower blood pressure and enhance balance. Another option is to get a massage.

If you decide to try assisted stretching offered at a studio, listen to your body, and make sure you communicate how you’re feeling with the therapist working on you, Dr. Tenforde advises.

But you’ll probably do more for your overall health by spending that time taking a brisk walk or some other type of exercise instead, he says. Most Americans don’t meet the federal recommended guidelines for physical activity, which call for 150 minutes per week of moderate-intensity exercise and muscle-strengthening activities twice weekly. "As doctors, we’re dealing more with diseases related to inactivity, not diseases of inflexibility, says Dr. Tenforde.

Want to do your stretching at home?

Three easy morning exercises — an A-B-C routine of arm sweeps, back bend, and chair pose — can help ease morning stiffness. This also works well during the day if you spend too much time sitting.

Stretching at home could save you money and time. These tips can help you get the most out of at-home morning stretches or other flexibility routines.

  • Warm up muscles first. Much like taffy, muscles stretch more easily when warm.
  • Feel no pain. Stretch only to the point of mild tension, never to the point of pain.
  • Pay attention to posture and good form. Posture counts whether you’re sitting, standing, or moving. Photos of stretches tell only part of the story, so read instructions carefully to get form right.
  • Focus on the muscle being stretched. One side of your body often is tighter than the other. Work on balancing this over time.
  • Breathe. Breathe comfortably while stretching rather than holding your breath.
  • Practice often. You’ll make the best flexibility gains if you stretch frequently — daily, or on as many days of the week as possible. At the very least, try to do stretches two or three times a week.

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Gift giving for family or friends in assisted living

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Have family or friends in assisted living facilities? Finding the right gift can be complicated. Health issues may rule out some gifts: cross off sweets or chocolates for those who need to keep blood sugar under control. There isn’t much space for extra belongings in the apartment or room. In some cases, your giftee’s physical or mental capabilities (or both) are declining.

"Any gift you give will probably be appreciated," says Dr. Suzanne Salamon, associate chief of gerontology at Harvard-affiliated Beth Israel Deaconess Medical Center. "But it helps if it’s something the person can really use and will enjoy. Tailor it to their particular ailments, needs, and interests." Below is a roundup that can help you select a great gift for the holidays — or any other occasion.

Gifts for social engagement

"Many people feel lonely and isolated in assisted living facilities. Keeping loved ones socially connected combats that, and also helps ward off chronic disease and cognitive decline," Salamon notes. Gifts that may fit the bill include:

  • A simple phone. The easier a phone is to operate, the more likely your loved one will be able to use it. That could be a landline phone with large, easy-to-read numbers ($25 and up), a flip phone ($35 and up), or a smartphone with few buttons and apps ($50 and up). Remember that cell phones come with monthly service costs; prices depend on the carrier.
  • A smart speaker. If phone use is too hard for your loved one, consider a smart speaker ($20 and up) that can be programmed to dial important numbers (like yours). Commands can be said aloud at any time to make a call. Check if your loved has internet service, which is needed for smart speaker use.
  • A photo book. A loose-leaf photo album (less than $20) or easily created photo book ($10 and more) with recent photos of family and friends may be a warm reminder of connections, or can be a gift to share with others in the assisted living facility. That social interaction is important for health. Plus, it will make the person feel good to see all of those photos of people who love them.

Gifts to aid independence

Health problems can make simple activities challenging. These gifts can give your loved one a little independence.

  • Adaptive tools. Your loved one may be able to take back some control of dressing with a long-handled shoehorn, a button hook, or a zipper pull (less than $10 each).
  • A magnifying glass. Especially handy for those with impaired vision (and who hasn’t misplaced reading glasses?), having a magnifying glass ($5 and up) is handy for reading or seeing small objects. For a nice upgrade, make it a lighted magnifying glass ($15).
  • Handwriting aids. Hand arthritis or neurodegenerative conditions (such as Parkinson’s disease) make writing difficult. Ergonomically-shaped adaptive pens ($10 and up) can help your loved one jot down information or thoughts.

Gifts for sharper thinking skills

"Challenging your brain or learning new information promotes new brain cell connections, which help protect and maintain cognition," Dr. Salamon says. Give your loved one something that will make the process easy and fun, such as the following:

  • A daily trivia calendar. (About $15)
  • Large-print nonfiction or fiction books. ($5 and up). Audio selections are enjoyable, too.
  • Large-print books of brain games and puzzles. ($5 and up)
  • A print subscription to a health publication, such as the Harvard Health Letter ($24).

Gifts to ease health issues

A well-chosen gift can bring comfort and help ease health issues. Try addressing someone’s aches and pains with gifts such as:

  • A microwavable heat wrap ($15 and up).
  • A handheld massager ($5 and up).

Or you could address circulatory problems that make people feel cold or increase the risk for blood clots in the legs. Ideas include:

  • A soft fleece blanket ($10 and up).
  • Warm slippers with slip-resistant soles ($20 and up).
  • Brightly patterned compression stockings with fun designs ($15 and up). Be sure to check the size so they aren’t too small for your loved one.

Gifts to track health

Even though assisted living facility staffers monitor residents’ health, your loved one may find it useful to have one of the following gifts:

  • A blood pressure monitor ($30 and up). Look for one with a cuff that goes around the upper arm; inflates automatically; has a lighted background with large numbers; and is certified by the Association for the Advancement of Medical Instrumentation, the British Hypertension Society, or the European Society of Hypertension.
  • A digital "stick" thermometer ($10 and up). The right one will be large and easy to hold, with a lighted background and large numbers.

Not quite right?

Keep thinking. A nice, warm fleece sweater ($20 and up)? Extra reading glasses to place in favorite nooks ($15 and up)? If none of these ideas is right, consider giving a healthy treat. A great choice right now is fresh citrus (send a box for $30 and up). "Avoid grapefruit, which can interfere with certain medications," Dr. Salamon advises, "but oranges or tangerines are sweet and rich in vitamin C, which supports a healthy immune system. And that’s a great gift."

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Tics and TikTok: Can social media trigger illness?

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A student suddenly develops leg pain and paralysis; soon hundreds of schoolmates have similar symptoms. Nuns begin biting each other, and soon the same thing is happening at other nearby convents. Three schoolgirls begin laughing uncontrollably, sometimes going on for days. When nearly 100 classmates develop the same problem, the school is forced to close down.

Yet in each case, no medical explanation was ever found. Eventually, these came to be considered examples of mass sociogenic illness, which many of us know by different names: mass hysteria, epidemic hysteria, or mass psychogenic illness. Over the years, many possible sources for these illnesses have emerged — and today TikTok and other social media sites may be providing fertile ground.

What is sociogenic illness?

The hallmark of these conditions is that multiple people within a social group develop similar, medically inexplicable, and often bizarre symptoms. In some cases, those affected believe they have been exposed to something dangerous, such as a toxin or contagion, although thorough investigation finds none.

The suffering caused by these illnesses is quite real and profound —even in the absence of a clear cause and presence of normal test results. And no, a person with sociogenic illness is not "just looking for attention" or "doing it on purpose."

Labeling people as hypochondriacs or "crazy," or illness as "hysteria," isn’t helpful. Hysteria and hysterical — drawn from hystera, the Greek word for womb — are loaded terms, often used to diminish women as psychologically unstable or prone through biology to uncontrollable outbursts of emotion or fear. And while some researchers suggest these illnesses more commonly affect women, most of the published literature on this condition is decades old and based on a limited number of cases.

Common features of mass sociogenic illness

Past outbreaks include illnesses in which people suddenly fainted; developed nausea, headaches, or shortness of breath; or had convulsive movements, involuntary vocalizations, or paralysis. Usually, these outbreaks occurred among people in close proximity, such as at a school or workplace. Rarely, cases appear to have been spread by shows on television. Now, social media is a possible new source.

Certain features are typical:

  • experiencing symptoms that have no clear medical explanation despite extensive investigation
  • symptoms that are temporary, benign, and unusual for those affected
  • rapid onset of symptoms and rapid recovery
  • those affected are connected by membership and interaction within a social group or by physical proximity.

Generally, treatment includes:

  • ruling out medical explanations for symptoms
  • shutting down a facility where it occurred
  • removing people from the site of supposed exposure (online or not)
  • separating affected individuals from one another.

Reassurance regarding the lack of danger, and demonstrating that the outbreak stops once individuals are no longer in close contact with each other, generally reduces anxiety and fosters recovery.

Tics and TikTok: a new driver of sociogenic illness?

The first known examples of social media-induced sociogenic illness were recognized in the last year or two, a time coinciding with the pandemic. Neurologists began seeing increasing numbers of patients, especially teenage girls, with unusual, involuntary movements and vocalizations reminiscent of Tourette syndrome. After ruling out other explanations, the tics in these teenagers seemed related to many hours spent watching TikTok videos of people who report having Tourette syndrome and other movement disorders. Posted by social media influencers, these videos have billions of page views on TikTok; similar videos are available on YouTube and other sites.

What helped? Medications, counselling, and stress management, according to some reports. Avoiding social media posts about movement disorders and reassurance regarding the nature of the illness also are key.

Geographic boundaries may have become less relevant; now, the influences driving these illnesses may include social media, not just physical proximity.

Dancing plagues, mad gassers, and June bugs

Sociogenic illnesses are nothing new. If you had lived in the Middle Ages, you might recall the "dancing plague." Across Europe, scores of afflicted individuals reportedly began to involuntarily and deliriously dance until exhaustion. And let’s not forget the writing tremor epidemic of 1892, the Mad Gasser of Mattoon during the mid-1940s, and the June bug epidemic of 1962.

The anxieties and concerns of the times play a role. Before the 1900s, spiritual or religious overtones were common. When concerns were raised about tainted foods and environmental toxins in the early 1900s, unusual odors or foods sparked a rash of palpitations, hyperventilation, dizziness, or other anxiety symptoms. More recently, some residents of the West Bank who thought nearby bombings released chemical weapons reported dizziness and fainting, although no evidence of chemical weapons was found.

Closer to home, reports are swirling that Havana syndrome may represent another example of mass sociogenic illness, although no firm conclusions can yet be made. Initially described among members of the US State Department in 2016 in Havana, Cuba, individuals who experienced this suddenly developed headache, fatigue, nausea, anxiety, and memory loss.

These symptoms have been reported by hundreds of people in different parts of the world. Many are foreign service workers attached to US diplomatic missions. Soon after the first case reports, suspicion arose that a new weaponized energy source was causing the illness, such as microwaves fired from some distance. Cuba, Russia, or other adversaries have been blamed for this. Thus far, the true nature and cause of this condition is uncertain.

Nocebo, not placebo

One theory suggests that sociogenic illness is a form of the nocebo effect. A placebo — like a sugar pill or another inactive treatment — may help people feel better due to expectation of benefit. The nocebo effect describes the potential that people could have a negative experience based purely on the expectation that it would occur.

Think of it this way: you may be more likely to experience a headache from a medication if you’ve been warned of this possible side effect, compared with another person warned about a different side effect. Similarly, let’s say you see people fainting. If you believe this is caused by a substance they — and you! — were exposed to, you may faint, too, even if there’s no actual exposure to a substance that could cause fainting.

The bottom line

We don’t know why some develop sociogenic illness while others don’t. Plenty of people have lots of stress. Millions of people were stuck inside during the pandemic and turned to social media for more hours each day than they’d like to admit. Many people are prone to the power of suggestion. Yet, sociogenic illness remains relatively rare. Despite existing for hundreds of years, much about this condition remains mysterious. An open mind is important. Some cases of sociogenic illness may be due to an environmental toxin or contagion that wasn’t detected at the time.

If you or a loved one spends a lot of time on social media and has developed an illness that defies explanation, talk to your healthcare providers about the possibility of social media-induced sociogenic illness. We may soon learn that it’s not so rare after all.