REM stages and one REM stage. Ideally, you repeatedly cycle through each stage. Learn how long each stage lasts.

Research shows women need more sleep than men due to biological differences, hormonal changes, and lifestyle factors.

Hallucinogens like DMT, psilocin, and LSD might rewrite the rules of sleep, blurring the line between dreams and reality.

Part of cortisol's impact is mediating the stress response — that fight-or-flight instinct that allows you to deal with ...

Science reveals a powerful, often overlooked link between sleep and sex. From hormonal shifts to intimacy disruptions, here’s ...

Sleep is more than rest — it's repair. Boost focus, immunity, skin, and well-being with deeper, quality sleep.

Sunlight plays a huge role in our energy levels and sleep quality. One study found that those who got enough morning sunlight ...

I talked to two ob-gyns and two mental health experts to find out what happens to menstruating people’s bodies and minds during each of the menstrual cycle phases. Here, I’ve broken down everything ...

Research has shown that almonds can actually reduce insomnia. This may be because they contain high doses of melatonin, which ...