Harvard Health Blog

Recent news reports about cases of polio have some parents concerned about the illness. Tthe vaccine is safe and remarkably effective, and widespread vaccination builds herd immunity.

Ketamine has been used for decades as an anesthetic, and in 2019 an inhaled version of it was approved by the FDA for treatment-resistant depression. But it is generally prescribed only when other treatments have not been effective.

An estimated 7% of Americans have an autoimmune disorder, and these tend to disproportionately affect women. Expert guidelines can help with questions about the best birth control options for people with lupus and other autoimmune diseases.

The time pressures of primary care doctors make it unlikely that they will be able to give their patients tests of cognitive function. So how will the growing numbers of people at risk for Alzheimer’s or another type of dementia be identified? A self-administered test is now available.

Digestive troubles are no one’s idea of fun, but having them occur while traveling or vacationing is even worse. Here’s a closer look at three common digestive upsets, how to prevent them, and what to do if you have one.

Summertime offers a great variety of fresh vegetables. Making vegetables the focus of a meal has many health benefits, and anyone can take advantage of this by preparing them in simple yet delicious ways.

It's hard to accurately predict when new viral outbreaks will appear or old viruses will reappear and how to figure this out quickly enough to respond quickly. Wastewater testing, a tool that can help predict upticks in COVID cases, has also captured evidence of infectious diseases like polio, allowing preventive measures to be taken.

After a man has had a radical prostatectomy, sometimes the level of the antigen PSA rises again later, meaning cancer may have returned. A study found that the normal therapy given when this happens is more effective when combined with other forms of treatment.

Legs are the foundation for many enjoyable activities—running, bicycling, swimming, and more. Building strong leg muscles can improve your performance, build endurance, and reduce your risk of injury. These exercises will work all of the major muscle groups in your legs.

Intermittent fasting is limiting the window of time each day when a person eats. It has become popular as a weight loss tool, so people want to know if it’s effective and whether it can work for them, and a recent study attempted to provide some answers.

One in three Americans takes a daily multivitamin even though research shows this doesn't provide any meaningful health benefits for most people. And because of the way supplements are regulated, some supplements make claims that have no evidence behind them.

A new study found a higher risk of melanoma among people who ate the most fish, but limitations of this research mean it’s premature to draw any conclusions about a relationship between eating fish and melanoma risk.

Humans’ relationship with music is complex and individual, and there are times when music can have a clear and immediate impact on our well-being. Music therapy uses music as a therapeutic tool to address certain health care goals.

Pea, potato, and pistachio milk? Supermarkets now sell multiple kinds of plant-based milks made from nuts, beans, grains, vegetables, or fruit. Before trying these, some people might like to know more about nutritional benefits and any other reasons to choose or avoid them.

Wheelchairs allow millions of Americans with mobility disability to participate in daily activities and engage in community life. But when a wheelchair needs to be repaired, delays can mean a person is unable to leave their home or manage daily tasks for days.

Splashy advertisements suggest that compression devices called waist trainers can help you sculpt inches off your waistline. The claims far outweigh the evidence, but exercises that strengthen core muscles can also help shape your waist.

The bacteria C. diff is responsible for half a million infections each year in the US. Many infections happen when people are hospitalized, but a recent report indicated that people can be infected without ever being hospitalized.

A side effect of many psychiatric medications is weight gain. Antidepressants, antipsychotics, anti-anxiety and sleep medications, and mood stabilizers can all affect metabolism in ways that lead to increased weight, so it’s important to know what you can do to lessen this unwanted effect.

Growing evidence suggests that poor sleep is linked to a host of health problems, including a higher risk of high blood pressure, diabetes, obesity, and heart disease. Now, a recent study on people in midlife finds that having a combination of sleep problems may nearly triple a person’s risk of heart disease.

Inflammatory bowel disease is commonly diagnosed at a point in life when many people are planning families. People who have been diagnosed with IBD are likely to have questions and concerns regarding fertility, conception, pregnancy, delivery, and breastfeeding.

A recent study suggested a vegan diet is an effective treatment for rheumatoid arthritis, and its lead author also said that people should try changing their eating patterns before turning to medication. But there is no evidence that changes in diet can prevent joint damage that occurs in rheumatoid arthritis.

Asthma is the most common chronic lung disease in children, and it can make life more difficult and less enjoyable for both children and their parents. The good news is that asthma is very treatable; here’s what families need to know.

Melasma is a skin condition affecting mostly women with darker skin. It cannot be fully prevented in those most likely to develop it, and there is no cure, but consistent sunscreen use is critical, and numerous treatment options are available.

Our understanding of how chronic inflammation can impair health has expanded dramatically in recent years, causing some people to wonder if there is a test to identify it, and if they should have it. There are several tests that can detect inflammation, and they are useful in certain situations, but not universally.