Advanced Skin Care 9 Actives with HPR & Sodium Hyaluronate Vegan Cruelty Free GMO Free More Actives. More Results. What is HPR? Hydroxypinacolone Retinoate (HPR) is a revolutionary, bioavailable form of vitamin A that works to dramatically improve the appearance of wrinkles and discoloration. What is sodium hyaluronate? This salt of hyaluronic acid works to plump up & moisturize while reducing the appearance of wrinkles. Next level serum…feared by wrinkles & sun damage alike Genuine flower power, natural antioxidants & active essentials work hand in hand to liberate the skin from signs of aging. By leaving out harmful chemicals, parabens, synthetic color & fragrance, Mad Hippie helps your skin achieve true harmony.