Vitamin E is the most potent fat-soluble antioxidant in human plasma. Although vitamin E was first discovered in 1922, its metabolic function remains an enigma. There are eight different molecular forms with vitamin E antioxidant activity, yet the body preferentially retains a-tocopherol. This preference for a-tocopherol has led the Food and Nutrition Board in its 2000 Dietary Reference Intakes (DRIs) for vitamin E to recommend that only a-tocopherol, not the other forms, meets human requirements for vitamin E. Moreover, only a-tocopherol is recognized by the hepatic a-tocopherol transfer protein (a-TTP). This protein regulates plasma a-tocopherol concentrations and genetic abnormalities in the protein (or its absence) leads to vitamin E deficiency in humans.

Gaining Weight 101

Gaining Weight 101

Find out why long exhausting workouts may do more harm than good. Most of the body-building workout and diet regimens out there are designed for the guys that gain muscle and fat easily. They focus on eating less and working out more in order to cut the excess fat from their bodies while adding needed muscle tone.

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