GLOSSARY

Gamma-Tocopherol is a tocopherol form present in several oils and nuts; dietary abundance differs from the body's preferential retention of alpha.

Vitamin E has eight natural forms: alpha, beta, gamma and delta tocopherols and tocotrienols. Chemical activity and retention differ. Alpha-tocopherol underlies human requirement references, so simply adding every form's mass or counting ingredient names does not necessarily reveal the amount meeting that requirement; the measurement convention and declared forms need identification.

Nuts, seeds and vegetable oils can provide E, with alpha and gamma proportions varying by source; almonds and some seeds contribute alpha. Assess actual portions rather than merely noting a vitamin name. Oils and nuts remain energy-dense for athletes, so E provision should fit a varied diet and suitable portions rather than unlimited addition.

For an oil rich in this compound, assess the whole food context; one molecule alone does not rank an oil's health value.

After E forms are absorbed, hepatic transfer proteins preferentially return alpha-tocopherol to circulation, while other forms are metabolised differently. A high dietary amount of another member therefore need not produce blood concentrations comparable to alpha. This regulation cannot be predicted simply from antioxidant wording or an oil being described as natural.