Harvard Health Blog

The surge in heat waves and extreme heat poses serious health risks for everyone but is a particular worry for older adults. What can you do to manage heat-related risks, especially if you have existing health conditions or take certain medications?

Climate change has made summers hotter, and the struggle to stay cool has led to more cases of heat-related illness. Don't wait until you're overheated to figure out how to cool down; use these ideas to get you started.

Every year, millions of men around the world get a prostate-specific antigen (PSA) test. Abnormal readings on the test suggest a man might have prostate cancer. But how should an abnormal result be interpreted?

Gratitude has the power to boost well-being, improve sleep, lessen depression, and help heart health. Now new data from the long-term Nurses' Health Study shows that it may extend lives. How can you jump start a gratitude practice in your life?

Flooding due to major storms or heavy rains can harm lung health, both from toxic contaminants that end up in the air and from the growth of mold caused by dampness. Taking steps to prevent flooding when possible and moving quickly to reduce health risks if flooding occurs can help protect your family's health.

Every year, more than 4,500 people die from drowning in the United States. Swimming lessons help save lives and parents should know how to choose the right program and encourage children to learn skills that will help them to stay safe at the beach and around ponds or pools.

Wildfire smoke contributes greatly to poor air quality, and as wildfires become more frequent due to climate change and drier conditions, more of us and more of our communities are at risk for health harms. Here are ways to cope.

Magnesium is a mineral the human body needs to function properly — especially for a healthy cardiovascular system, nerves, muscles, and bones — though the benefits of supplements are largely oversold. While most people get enough magnesium from their diet, in certain instances people should take a supplement.

The US Preventive Services Task Force recommends against screening for prostate cancer in men older than 70, but as life expectancy for this group increases and treatment options evolve, it's important for men to be aware of their options.

If you've ever had food poisoning caused by Salmonella bacteria, you know it's unpleasant but typically goes away within two to three days. You may not know that these bacteria sicken more than a million people in the US each year — and can be deadly for some. You can take steps to avoid getting sick.

Researchers have found that the risk of death due to Alzheimer's disease is markedly lower in taxi and ambulance drivers compared with hundreds of other occupations. And the reason could be that these drivers develop certain structural changes in their brains as they work.

A healthy diet is key to a healthy gut microbiome, which helps the immune system function well and reduces chronic inflammation among other important tasks. And increasing evidence suggests that fiber and fermented foods can play important roles in gut health.

It's fairly common for a medical treatment to cause side effects — but far more rarely, a side effect provides an unexpected benefit. This might be the case for the shingles vaccine, as evidence is mounting that it might also reduce the risk of dementia.

Long-term research found that higher consumption of butter increases mortality risk, while higher consumption of plant-based oil lowers it. And substituting certain plant oils for butter might help people live longer. What's a butter lover to do?

Our health is intertwined with the health of planet Earth, and the impacts of climate change threaten our well-being. Collectively taking small steps like eating more plant-forward meals, using bikes or public transit, and even sharing our pledges can help move the needle in a positive direction.

Monitoring daily step count can encourage people to be more active. When it comes to assessing fitness or risk for major illnesses, though, is a new measurement that combines both average steps and heart rate better?

Marketed as a natural remedy for an enlarged prostate, saw palmetto is a top-selling dietary supplement. By one estimate, more than a third of all US adults who take supplements use saw palmetto. But experts at Harvard say men should view its supposed benefits for prostate health skeptically.

Flooding due to major storms or heavy rains can harm lung health, both from toxic contaminants that end up in the air and from the growth of mold caused by dampness. Taking steps to prevent flooding when possible and moving quickly to reduce health risks if flooding occurs can help protect your family's health.

While medical knowledge on celiac disease has evolved over the past few decades, there are still aspects that remain poorly understood. Perhaps not surprisingly, misconceptions are widespread among the general public.

The troubling symptoms of prostatitis, or inflammation of the prostate, accounts for roughly two million doctor visits every year. Fortunately, research advances are leading to some encouraging developments for men suffering from this condition.

Problems with attention and focus, impulsivity, and constant motion are possible symptoms of ADHD.

If you've been cocooning due to winter's cold, who can blame you? But lack of activity isn't good for body or mind during any season. Any day is a good day to start exercising, but if you aren't sure how to start, or if you have an obstacle to overcome, read on.

Just because you can get a particular test or treatment or take a supplement doesn't mean you should. One study suggests as much as 20% of all health care in the US is unneeded. Skipping unnecessary care might actually improve your health, while saving time and money.

Wondering how to occupy your children during school break? Skip the screens and try these low-tech physical and creative pursuits.