Please find more about orexin: https://en.wikipedia.org/wiki/Orexin https://en.wikipedia.org/wiki/Orexin Let me quote: Orexin (/ɒˈrɛksɪn/), also known as hypoc

Please find more about orexin: https://en.wikipedia.org/wiki/Orexin https://en.wikipedia.org/wiki/Orexin Let me quote: Orexin (/ɒˈrɛksɪn/), also known as hypocretin, is a neuropeptide that regulates arousal, wakefulness, and appetite.[1] The most common form of narcolepsy, type 1, in which the sufferer experiences brief losses of muscle tone (cataplexy), is caused by a lack of orexin in the brain due to destruction of the cells that produce it. And another quote: Orexin-producing cells have recently been shown to be inhibited by leptin (through the leptin receptor pathway), but are activated by ghrelin and hypoglycemia (glucose inhibits orexin production). To have a good sleep you probably need relatively high glucose level.