L-Ascorbic Acid is Vitamin-C in its purest form. It is a powerful antioxidant that is fantastic for helping various forms of skin aging. L-Ascorbic Acid has even been known to reverse existing hyperpigmentation and fine wrinkling. Vitamin-C loses its potency when premixed with water, oil or when exposed to sunlight. This is why MERME’s comes in a powder form to ensure you get the highest potency each time mixed fresh.