Containing HPR, a revolutionary new form of Vitamin A that is significantly more bioavailable than retinol, this serum works to improve the appearance of sun damaged, ageing skin by combining the Vitamin A with aloe vera, hyaluronic acid and phytoceramide. Money Back Guarantee – we are so confident that you will love Mad Hippie that if for any reason you are not completely satisfied, return your purchased product(s), full or empty, within 60 days of purchase from us and receive Skinspace credit for the cost of the product(s).