Why Pick PRI Vitamin C Serum? Made exclusively for those who seek exceptional results, PRI Vitamin C Serum is a highly concentrated formula made with only the best ingredients. This is not a cheap - Cutting edge research. - Best results in short periods of time. - Get your youth back. How Does PRI Vitamin C Serum Work? This advanced topical Vitamin C serum erases all signs of premature aging with exceptional ingredients working synergistically to eliminate damage caused by the environment. Contains 20% Vitamin C, 0.5% Ferulic acid, and hyaluronic acid. Delivers 20% of L-ascorbic acid (Vitamin C) to the skin, the highest level effectively absorbed. Designed to treat problematic skin conditions such as erythema (abnormal redness of the skin), acne-prone skin Quality Guaranteed Every PRI Vitamin C Serum manufactured for the Phoenix Rejuvenation Institute is made within a FDA Approved and GMP certified facility. Good Manufacturing Process Standards are the highest and most stringent guidelines in the nutritional supplement industry. At the Phoenix Rejuvenation Institute we work relentlessly to provide the consumer with only the highest potency, highest purity, and most effectively absorbed formulations available to the consumer today.