The food supplement according to the present invention for protecting female and male fertility intended for oral administration, helping reduce both oxygenated free radicals, which cause DNA damage, and homocystine, therefore reducing the deleterious action of same on methylation, comprises, in combination: A first ingredient consisting of zinc bisglycinate； A second ingredient formed from a natural amino acid from the N-acetyl-L cysteine amino acid family； A first vitamin (B12) belonging to the cyanocobalamin family in a methylated form； A second vitamin (B2) from the Riboflavin family； A third vitamin (B6) originating from the pyridoxine chlorhydrate family； And a third ingredient formed from a levomefolic acid and, more particularly, from 5-methyltetrahydrofolic acid.
