The American Gut Project tests 21 at-home gut microbiome kits from seven companies and finds “major discrepancies.”

A new study finds transcranial magnetic stimulation, used for treatment-resistant depression, can provide significant symptom relief in just days instead of weeks.

A major, new evidence review finds taking a daily aspirin has little to no benefit for people at average risk of colorectal cancer, but it can cause dangerous bleeding and possibly stroke.

A new study finds cancer patients who develop a new mental health condition are at increased risk of mortality in the first one to three years after diagnosis.

While women have less artery-clogging plaque on average, a new study finds it doesn’t lower their risk for serious heart events.

Researchers uncover links between pregnancy-related brain changes, mother-baby bonding, and maternal mental health.

A new study finds athletes who ran ultra-long races — from 25 miles to more than 100 — showed signs of red blood cell damage that could affect how well oxygen and nutrients are delivered throughout the body.

A new study links spiritual or religious involvement to a significantly lower risk of harmful alcohol or drug use.

Teens who regularly drink large amounts of sugar-sweetened beverages — including soda, energy drinks, sweetened teas and coffee drinks — are more likely to report symptoms of anxiety.