L' Oreal Elvive Triple Resist Reinforcing Shampoo with arginine is an essential amino acid & a vital constituent of the hair fibre. Enriched in arginine + protein the new formula provides a triple reinforcing action: You put your hair through daily torture & sometimes it can lack essential nourishment, . Weakened, your hair has a tendency to break & fall out. Arginine is an essential amino acid & a vital constituent of the hair fibre. Enriched in arginine + protein the new formula provides a triple reinforcing action: REINFORCES HAIR FIBRE NOURISHES FROM ROOT TO TIP HAIR FEELS STRONGER PROVEN RESULTS: your Hair feels stronger from root to tip, healthy-looking, shiny.