This is because your body produces melatonin,

melatonin is not just, any other hormone.

The body clock responds to light cues, ramping up production of the hormone melatonin at night and switching it off when it senses light.

ramping up production of the hormone melatonin at night and switching it off when it senses light.

Melatonin is a hormone secreted by the brain, and is critical in regulating your sleep.

When it's dark, your body produces more melatonin, making you sleepy.

The SCN controls our sleep-wake cycle and the release of melatonin, which is a hormone that triggers the sleeping part of the sleep/wake cycle.

The SCN controls our sleep-wake cycle and the release of melatonin

Sunlight helps keep your brain working well, without it, your brain doesn't know when or how to release the sweet, sweet melatonin.

Your brain doesn't know when or how to release the sweet, sweet melatonin.

or blue light from the ipad inhibited the release of melatonin in the subjects, and

Melatonin is a hormone synthesized from the amino acid tryptophan and it makes you feel

hormones like cortisol. But with nightfall comes the release of sleepy melatonin hormones

Talkin' melatonin, get it and fight coma

Talkin' all Melatonin, get it and fight coma

to secrete is a chemical called melatonin. It does that only when it's night time. And

so if your eyes are open during the day you're not going to be secreting melatonin. But when