This award-winning serum uses Sodium Ascorbyl Phosphate, a more stable form of Vitamin C than the more commonly-used L-Ascorbic Acid. It's also less irritating, so if you struggle with other Vitamin C products, give this one a try. The Vitamin C is blended with Vitamin E and Ferulic Acid (also powerful antioxidants), and Hyaluronic Acid and Chamomile Extract to moisturise and soothe the skin. 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).