Keratin is the main substance that makes up hair. It consists of living peptides. The biotechnologists at K18 have spent 10 years researching and developing it. They have extracted living peptides that have the ability to replicate their own genes. Usage and Precautions Make sure to wash your hair with shampoo before use. Do not use any other products except shampoo to clean your hair! Clean hair ensures effective penetration of the mask. Wipe clean hair until half dry, no water dripping is considered half dry. Press 1 pump of the 50ml bottle Rub it evenly in your palm, then apply it to your hair, from tip to root. It is recommended to rub it in the palm of your hand until it turns white. If you feel that the amount is not enough, take another 1 pump, normal hair volume is about two pumps of dosage!