P1 SINERGY BIOPERMANENT for natural 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 P1 specifically for natural hair diffuses moisturizing and nutrition, essential notes for a healthy and vital hair and allows to enhance the ripple by giving the hair volume and body.