2 pack - vitamatic melatonin 20mg fast dissolve 120 tablets | nighttime sleep aid | natural berry flavor | vegetarian, non-gmo, gluten free (total 240 tablets) vitamatic melatonin is a hormone that naturally occurs in human body. it is made by the pineal gland. melatonin circulates through a daily cycle so there is a higher concentration of it at. higher levels of melatonin is required for sound & better sleep.