MTNR1A
MTNR1A melatonin receptor 1A — the molecular target that 1 compounds in the wiki act on.
In one line: The receptor for melatonin — your body's "it's night time" signal.
MTNR1A is a receptor for melatonin, the hormone your brain releases in darkness to say "it's night." It doesn't knock you out like a sedative — it re-times your internal body clock. That's why melatonin works best for jet lag and for people whose sleep runs late, rather than as a sledgehammer.
The common mistake is dosing far too high: a tiny amount (0.5 mg) shifts the clock as well as 10 mg, with less next-morning grogginess.