Learn how caffeine affects brain chemicals and health, sleep, and mood. Understand safe daily limits, hidden sources, and signs you’re getting too much.

Tourette’s syndrome, a neurological condition that causes involuntary sounds or movements known as tics, has come under the spotlight after a man with the condition shouted a racial slur during the ...

Oolong tea may help boost metabolism, support fat oxidation, and offer additional benefits for blood sugar. Learn the best way to drink oolong tea.