Abstract: A composition for regulating male sexual function includes at least one amino acid selected from a group consisting of L-Glutamic acid (glutamate), L-Arginine, glycine, L-aspartate, L-carnitine, L-tyrosine, L-glutamine and/or its pharmaceutically acceptable salt, such as any of monosodium-L-glutamate monogidrate, L-potassiumarginine, L,-ammoniumaspartate, L-arginine HCl, sodium-L-tyrasine, lithium aspartate, in the amount of 1-1000 mg, preferably 10-300 mg; at least one vitamin, in the amount of 1-500% of a daily recommended dose, preferably 10-200%; and at least one chelated compound of a formula: acid-Me-acid.nH2O, wherein Me is a metal chosen from any of Ca, Mg and Zn, wherein the acid is a dicarboxylic acid anion chosen from the group consisting of succinic acid, fumaric acid or aspartic acid, and wherein n=0-8. The composition increases testosterone level in a body of a male mammal.