Myrtle Leaf products get their high concentration of vitamin C from Seabuckthorn Fruit and Seed Oils and Rosehip Seed Oil. The berries from these plants contain natural vitamin C enveloped in a silky oil enabling it to penetrate deeply into the skin where it feeds live cells this life-giving nutrient. FIKX also uses water-soluble citric acid as a preservative and added nutrient in most products.