Harvard Health Blog

The burning of fossil fuels is a major contributor to climate change, and pollution from this burning has been linked to millions of premature deaths worldwide. And, according to a new report, even low levels of air pollution may harm our health although we can take steps to limit exposure.

If you need surgery, does the sex of the surgeon matter? A study reviewed procedures done in Canada over a 12-year period involving more than a million adults, and found that in general, people operated on by female surgeons were less likely to experience complications. But why?

Depression is common among older adults, and insomnia doubles the risk of major depressive disorder. There is increasing evidence that treating insomnia in older people who have both insomnia and major depression has the potential to improve both their sleep and their mood.

Due to the lengthy wait for an appointment with a therapist, many people have turned to the numerous mental health apps available on smartphones. Research did not find convincing evidence that use of any such app resulted in significant improvement in symptoms, but some may be useful as a complement to therapy.

Though decades of research have suggested risk factors for amyotrophic lateral sclerosis, a specific cause remains unknown. New research studied professional football players and found that they had a much higher risk of developing ALS than men in the general population, though the study was only observational.

Most people have heard the nutritional recommendation to eat five servings of fruit per day. But are some fruits better for you than others? Is it okay to eat dried or frozen fruit, or to drink fruit juice? Does it have to be organic?

Studies of contestants from the TV show The Biggest Loser found that due to changes in metabolism, people who have lost large amounts of weight have to follow an extremely low-calorie diet in order to maintain the weight loss. Subsequent research indicates that these metabolic changes are related to calorie restriction while weight is being lost, but later become a function of sustained physical activity.

A doctor's serious health threat prompts reflection on the power of spirituality, the value of mindfulness practice, and acknowledgment of mortality as a motivator to reassess one's priorities.

All parents want their children to be happy and able to successfully navigate life's challenges. Five core skills form a great foundation, and while parents can and should support young children in building these skills, encouraging teens to reinforce and refine their skills is important.

Of the more than six million people over 65 in the US who have Alzheimer's disease, almost two-thirds are women. This is partly because women live longer than men, but other factors make women more likely to develop the disease, especially later in life.

Simple coping strategies like counting to 10 are often useful to help you avoid an outburst. But as multiple challenges in recent years have amped up stress levels, those strategies may not be enough. So what steps can you take to avoid reaching your boiling point?

For hundreds of years there have been documented instances of groups of people developing similar, medically inexplicable, and sometimes bizarre symptoms, such as paralysis, involuntary tics, or uncontrollable laughter. Known as sociogenic illness, a recent example appears to be fueled by social media postings—meaning physical proximity is no longer a factor.

The first three years of life are crucial for brain development. Interactions between babies and their caregivers build neural connections in the brain and lacking sufficient interactions may affect brain development. A study found that babies born during the pandemic scored lower in several areas of development than babies born before it started.

With colds, flu, and COVID variants circulating, keeping your immune system healthy is even more important. Advertising would have you believe that some supplement or other is the key to protecting yourself from getting sick, but the best strategies to protect yourself involve common sense and simple steps.

Osteoarthritis (OA) is the number one cause of chronic knee pain, affecting nearly a quarter of people 40 or older. A recent study of people with overweight or obesity and OA showed that telehealth visits can be an effective way to provide care and may even help with weight loss, which can improve symptoms and prevent OA from worsening.