Epitalon aims to restore endogenous melatonin production, so adding exogenous melatonin may confuse the feedback mechanisms you are trying to restore
Randomized, double-blind, placebo-controlled trial of selenium supplements among HIV-infected pregnant women in Tanzania: effects on maternal and child outcomes
Other classes of non-enzymatic components include vitamins (e.g., ascorbic acid, -tocopherol), enzymatic cofactors (e.g., Coenzyme Q10), nitrogen compounds (e.g., uric acid), carotenoids (e.g., -carotene, lutein), and minerals (e.g., zinc, selenium)
10.3389/fcimb.2018.00013 182
Replenish naturally occurring glutathione within the body