NADH 20 mg CO-E1 - Peppermint Sublingual, 30 Tablets, Source NaturalsSource Naturals NADH 20 mg For Energy And Mental Alertness. Peppermint Sublingual. NADH, a natural coenzyme derived from vitamin B 3 (niacin) is essential for basic metabolism, respiration, the breakdown of sugars and fats, and the production of ATP, the primary energy molecule in our cells. NADH supplies ATP energy to the brain, nerves, muscles, heart and all other organs, in order to function. Chlorophyll supports cellular energy production by