Beauty sleep is real: what happens to your skin at 2 AM

Cell renewal peaks at night. Here's how to work with your circadian rhythm, not against it.

Skin follows its own clock. Between 11 PM and 4 AM, cell division and repair reach their peak.

Night actives

This is the window for retinoids and peptides — your skin is most receptive.

Protect the window

Silk pillowcases, a cool room and no screens 30 minutes before bed make a measurable difference.