Long-term steroid use can reshape the structure of the brain, causing some parts to shrink and others to grow, a major new study reports. People taking steroids — even inhaled steroids — appear to have less intact...

Research has linked heart disease to specific autoimmune diseases such as rheumatoid arthritis and lupus. Now, a huge study shows that autoimmune diseases as a group increase your chances of developing heart ills. Autoimmune diseases such as...

When teenagers with type 1 diabetes get better control of their blood sugar, their brains may benefit, a new clinical trial shows. Researchers found that when teenagers started treatment with a newer technology — often dubbed “artificial...

The U.S. Food and Drug Administration on Wednesday gave the green light to updated COVID booster shots from both Pfizer and Moderna that target Omicron variants, paving the way for the shots to get into American arms...

Fertility preservation procedures for women with breast cancer won’t raise the risk of their cancer returning later, a new Swedish study shows. Women who had eggs or embryos frozen before going through chemotherapy did not have any...

Life expectancy in the United States dropped for the second straight year, government health officials reported Wednesday. The decline from 77 years in 2020 to 76.1 years in 2021 puts U.S. life expectancy at the lowest level...

Munching handfuls of microwave popcorn might be perfect for movie night, but your snack could be loading your body with potentially harmful “forever chemicals,” experts warn. Many microwave popcorn bags are lined with PFAS (perfluoroalkyls and polyfluoroalkyl...

It might seem incongruous, but new research suggests that teens who engage in more physical activity may vape more frequently than their less active peers. In the study, high schoolers who reported being physically active had a...

In Washington state, 22 wildlife bridges and underpasses provide animals with a safe way through to search for food or escape predators and wildfires. It turns out the crossings have been benefiting humans, too. In a 10-mile...

U.S. life expectancy drops by nearly 1 year. The decline from 77 years in 2020 to 76.1 years in 2021 puts U.S. life expectancy at the lowest level since 1996, the CDC said. The pandemic played a...