P2 SINERGY BIOPERMANENT for color treated hair: the result of advanced technology, this is the first biological perm lotion that contains neither ammonia nor thioglycolic acids nor any of its derivatives. Enriched with a complex of marine collagen amino acids and keratin, the formula restructures hair fiber, making it possible to create an extremely natural and elastic curl that is also soft to the touch. Excellent for use on color treated hair. Biopermanent P2 formulated for treated hair, delivers deep nutrition and refinement. It makes it possible to create defined and elastic curls even on sensitized hair and to enhance its color.