Half a Dozen Surprising Ways to Make Your Own Melatonin Naturally! You know melatonin as a hormone secreted by the human pineal gland. But a surprising discovery is that there is a plethora of plant sources of melatonin. Melatonin is an impressive natural way to encourage sleep. There are two obvious ways to increase your melatonin. One is to supplement it. That works great! The other is to eliminate light sources at night to help your body produce its own. But