La Roche Posay KERIUM Hair loss has a double action against hair loss: Madecassoside, an ingredient derived from research on inflammation, active against micro-irritation that accelerates hair loss and Aminexil, the reference substance against hair loss, foothold in the scalp. Extension of the hair growth after six weeks, demonstrated in a clinical study under dermatological control. apply to pre-washed and dried hair 12 buffs to be distributed around the whole scalp.