Antioxidants are either soluble in lipids/fat (hydrophobic) or water (hydrophilic). Both of these are required by your body in order to protect your cells, since the interior of your cells and the fluid between them are composed of water, while the cell membranes themselves are mostly made of fat.
Lipid-soluble antioxidants are the ones that protect your cell membranes from lipid peroxidation. They are mostly located in your cell membranes. Some examples of lipid-soluble antioxidants are vitamins A and E, carotenoids, and lipoic acid.
Choose from the below list of fat-soluble anti-oxidants to compliment other water-soluble antioxidant products you might be taking.