The usefulness of a drug is typically measured by its active ingredient. But traditional Chinese medicine shows that there’s more to healing than using the right chemical.

Some AI systems make faulty assumptions about women and nonwhite men, which can lead to misdiagnoses. Overcoming this bias takes legal, regulatory and technical fixes.

Fungi are a small but important part of the gut microbiome. A new study in mice shows that how much weight mice gain on a processed food diet depends on this fungal microbiome.

A year after it became clear that COVID-19 was becoming a pandemic, there is still no cure, but doctors have several innovative treatments. Some are keeping patients out of the hospital entirely.

Weed, though far less dangerous than many other drugs, is not entirely without risk. Some 59% of people treating pain with medical cannabis experience moderate to severe withdrawal symptoms

The tiny air pollutants known as PM2.5, emitted by vehicles, factories and power plants, aren’t just a hazard for lungs. A study finds more brain shrinkage in older women exposed to pollution.