New research compares several ways of estimating body composition and finds one of the simplest tools holds up surprisingly well.

A team in Japan found a common berry compound doing something unexpected inside muscle cells—and it's not about weight loss.

 Researchers pooled 18 clinical trials to answer a question positive psychology research had never quite settled—and the answer comes down to timing.

A compound found in an unusual edible marine animal produced striking changes in aged mouse brains—and even their hair.