Melatonin is a hormone in the brain that maintains your body's circadian rhythm, and therefore, regulates sleep. Taking ...

Salmon sperm facials are a buzzy new K-beauty treatment with supposed anti-aging effects. Dermatologists explain the trend ...

Breast tenderness and other symptoms of puberty may precede menarche (the first period). Learn how to sense when her period ...

Wernicke-Korsakoff syndrome causes memory changes and other neurological symptoms. Learn why it’s underdiagnosed and more ...