Vitamin E

Vitamin E is a family of eight related compounds: four tocopherols (alpha, beta, gamma, delta) and four tocotrienols. Alpha-tocopherol is the form that humans preferentially absorb and retain, but gamma-tocopherol is the primary form in the diet and plays distinct antioxidant roles. Most commercial supplements use only alpha-tocopherol, which is a reductionist approach that may displace gamma-tocopherol.

Vitamin E is the primary fat-soluble antioxidant in cell membranes, protecting polyunsaturated fatty acids (particularly in the phospholipid bilayer) from lipid peroxidation by free radicals. It also modulates platelet aggregation, immune cell function, and vitamin K metabolism. Its antioxidant activity is regenerated by vitamin C — these two vitamins work synergistically.

100–400 IU/day (from mixed tocopherols). RDA: 15 mg alpha-tocopherol (~22 IU natural form). Clinical benefit in heart disease prevention research was not demonstrated at doses above 400 IU/day. Mixed tocopherols (including gamma) are preferred over isolated alpha-tocopherol.

Mixed Tocopherols (d-alpha, d-gamma, d-delta, d-beta): Closest to the natural distribution found in food; preserves gamma-tocopherol activity | d-Alpha-Tocopherol (natural): Better than synthetic but lacks complementary tocopherol fractions | dl-Alpha-Tocopherol (synthetic): Synthetic form with only 50% the biological activity of natural vitamin E; displaces natural forms

UL: 1,000 mg alpha-tocopherol/day (~1,500 IU natural). High doses (>400 IU/day) may increase all-cause mortality in some meta-analyses and can interfere with vitamin K-dependent clotting — caution with anticoagulants. This information is educational and is not medical advice.

SuppsBuddy flags synthetic dl-alpha-tocopherol products and penalizes isolated alpha-tocopherol vs. mixed tocopherol formulations. Products exceeding 400 IU/day receive a safety caution flag.