There is an increasing interest in the use and measurement of antioxidants in food, pharmaceutical, and cosmetic industries. This interest is rooted in the cumulative evidence that connects oxidative stress with numerous degenerative disorders ranging from premature aging ,prostaglandin-mediated inflammatory processes, cancer, and a long series of diseases in which free radicals are implicated (1, 2). In addition, many states implement very rigorous regulations on the use of food preservatives, so that they only allow the use of natural antioxidants. Basically, these include vitamin C (ascorbic acid), vitamin E (tocopherols and tocotrienols), and relatively complex extracts from a number of plant species (Rosmarinus of®cinalis, Nerium oleander,and Myrtus comunis).