Sound machines promise better sleep, but new research suggests they may quietly steal your REM and deep sleep.

Pink noise by itself, equivalent to "moderate rainfall," was linked to a loss of 19 minutes of REM sleep. And pink noise combined with aircraft noise led to "significantly shorter" time spent in deep ...

The restorative effects of sleep on the brain are well known, but what happens at the neural level remains a fascinating mystery. A groundbreaking study led by researchers from Rice University, ...

New evidence is highlighting just how important sleep is for overall health. Emerging research published in The Journal of Immunology found a link between sleep deprivation and the immune system, and ...

Taking l-theanine daily for a short period is generally safe, although not enough research has been done on its long-term use.