As people grow older, the same brain chemistry that once supported sharp thinking and stable mood can quietly start to work against them. A new wave of research is revealing how a single amino acid, ...

Every Thanksgiving, myths of the quasi-magical powers of tryptophan rise again. There’s the turkey/drowsiness myth: Eating lots of juicy turkey meat supposedly makes people feel tired because it ...

Scientists have discovered that an imbalance of certain chemicals in the brain could help explain why teenage girls are at greater risk of depression than boys. Specifically, researchers claim to have ...

Something happens when a rat starts running. Not just the obvious things, the faster heart, the warming muscles, the rhythmic percussion of paws against the wheel. Something quieter. Something that ...