Recommended Daily Allowance

Of the fatty acids, polyunsaturated fatty acids are most likely to undergo oxidation in the presence of oxygen or oxygen-derived radicals. The necessary amount of vitamin E depends on the amount of polyunsaturated fatty acids in the diet. The greater the amount of these fats in the diet, the greater the risk they will be damaged by free radicals and exert harmful effects. Because it is impossible to obtain a high intake of vitamin E without consuming a high-fat diet, use of vitamin E supplements is often recommended [4].