Ascorbyl Tetraisopalmitate (Vitamin C Ester) O Cosmedics AU Vitamins Explained: Water vs. Fat Soluble Water Soluble Vitamins: Vitamin B Vitamin C Fat Soluble Vitamins: Vitamin A Vitamin D Vitamin E Vitamin K Tip: Water soluble vitamins dissolve in water, It's simply NOT POSSIBLE for Vitamin C to naturally be present in an Oil based product. For many years cosmetic companies have incorrectly claimed that their oil based products like Face Oils and Body Liposomal Vitamin C Capsules