The micronutrients in HairTone Nails & Skin Premium that contribute to the maintenance of normal hair condition are zinc, selenium, and biotin, for nails selenium and zinc, while for skin biotin and zinc*.
The formula is enriched with the amino acids proline, cysteine, lysine, as well as MSM and vitamins B5, E.
*The above are official health claims by the European Food Safety Authority (EFSA).