Mind & Body

Lying awake at 2 a.m. again? Here’s what valerian, chamomile, lemon balm and magnesium are traditionally used for, what the studies really show, and the habits that matter even more.

Two slightly different tones, one in each ear, and your brain hears a beat that isn’t really there. Here’s how binaural beats work, which frequencies people use for sleep, calm and focus, and what the research actually shows.