This food supplement strengthens hair and nails thanks to its composition based on L-cystine, minerals and vitamins. It also contains soy isoflavones, L-cystine, iron, magnesium, zinc, manganese, biotin and vitamins (A, D3, E, B1, B2, B3, B6, B12). All these nutrients are necessary for the correct metabolism of the skin, hair and nails.