La biosthetique shampooing actif f is for fine hair and is a very gentle hair and scalp cleanser calibrated for fine hair la biosthetique shampooing actif f contains nature identical bonds and keratin building blocks from natural origins to strengthen the resistance of the outer cuticle to environmental damage and stops premature aging in the hair the cell active ingredients invigorate the scalp and stop the progress of the aging process the scalp is left clean and prepared for follow up hair