Sunvit Melatonin 1 mg 60 tabletsBenefit Cases of insomnia. Stimulating the nervous system. Main features Melatonin is a hormone naturally produced in the brain. Its synthesis and release are regulated by the light we are exposed to, being stimulated by darkness and suppressed by light. As a result, this hormone is closely linked to our circadian rhythm and the body's functions throughout the day and night. How to use Adult, take one (1) tablet daily, preferably at night before bed.