Limp and thin hair is an incredibly common hair concern across all hair types and lack of volume can be caused by several factors, including diet, product build up, hormones, genetics or stress. Peptides are chains of amino acids that support proteins naturally found in hair. The INKEY List Peptide Volumizing Hair Treatment is a lightweight serum that helps to increase hair's thickness and volume. Who It's For: - Fine hair in need of a volume and thickness boost. Key Ingredients: - 2% KERANUTRI: helps hair to look thicker and more voluminous. - 2% ACB PISUM SATIVUM PEPTIDE: Helps hair to look more voluminous. - 1% BETAINE: Helps to condition hair, leaving it soft and healthy. Product Claims: - Instant appearance of 10,000 more hairs after just one use. - 76% of participants agreed that their hair felt thicker. This product contains no animal derivatives and is alcohol and fragrance free.