The chemical structure of melatonin is unique, the redica difference in which the herbal melatonin is accompanied by other additives such as vitamins, minerals, natural compounds and here the important thing is to know exactly its concentration. In the case of a melatonin preparation alone, the quantity is known and must not possess any additive. Depending on the concentration, the dose can be adjusted according to the particular use: sleep disorders or supra-pharmacological conditions confers protection to the mitochondria and serves as a powerful antioxidant, with compounds that are products of their metabolism with equal or greater antioxidant capacity.