MitoNight with Melatonin, Value Size, 90 Capsules, Source NaturalsSource Naturals MitoNight with Melatonin Evening Care for Mitochondrial Repair. Dietary Supplement. Just like a car produces exhaust, your cellular engines your mitochondria produce toxic free radical waste even as they fuel you. MitoNight is unique in that it not only helps you get the quality of sleep you desire, but also fulfills the main purpose of sleep: to repair and rejuvenate your cells, particularly your mitochondria, the powerhouse of the