Mad Hippie's Vitamin A Serum works to exfoliate the skin, improving the appearance of sun damaged, aging skin. This next level serum is feared by wrinkles and sun damage alike. Nine actives with HPR and sodium hyaluronate. Hydroxypinacolone retinoate (HPR) is a revolutionary, bioavailable form of vitamin A that works to dramatically improve the appearance of wrinkles and discoloration. Sodium hyaluronate works to plump up and moisturize while reducing the appearance of wrinkles. Vega and cruelty-free.