K18 Leave in Treatment 50mlcreates hair like newTraveling deeper into the inner layers of hair than traditional repair products, our revolutionary patented K18Peptide is just the right size and makeup to fit in and reconnect broken keratin chains, renewing hair with strength, softness, smoothness, and bounce. You can feel and see the difference with the first use. See dosage chart for exact usage. For best results, use for the first 4 6 consecutive washes, then every 3 4 washes