Ashwagandha is everywhere right now. It's also been the subject of safety debates in Europe. Here's a straight guide. What it is Ashwagandha (Withania somnifera) is a plant from the Ayurvedic tradition. Most supplements, including...

Ever noticed that green tea feels different from coffee? Part of the reason is L-theanine. What it is L-theanine is an amino acid found naturally in tea leaves. Your body doesn't use it to build...

Hormones sound complicated. In everyday life you mostly need to know one thing: they follow rhythms, and your habits can support those rhythms or fight them. The day-and-night pair Cortisol helps get you going. It...

If I could give one free sleep tip, it would be this: get bright light early and keep it dim late. Why light matters Your body clock reads light to work out what time it...

Most of us think about sleep only when we get into bed. By then the day has already decided how well we'll sleep. Here's how I plan my day with the night in mind. Morning:...

I train a lot, and the thing that changed my progress most wasn't a new program. It was taking my nights seriously. Think of sleep as a work shift While you're asleep your body is...