VITAMIN E - that have been damaged by free radicals A...

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VITAMIN E Functions of Vitamin E Resides mostly in cell membranes. Antioxident can form a barrier between a target molecule (an unsaturated fatty acid in a cell membrane, for example—and a compound— and a compound seeking its electrons) Free radicals- pull electrons form cell membranes, DNA, and other electrodense cell components. This either alter’s the cell’s DNA, increasing the risk of cancer or injuries in the cell membranes. Free radicals are highly reactive compounds containing an unpaired electron The body needs antioxidents like Vitamin E to carefully regulate this exposure to avoid related undesireable effects. Cells do not rely exclusively on Vitamin E for protection from free radicals Other antioxidents exists in cells as well, utilize minerals, such as copper, selenium, and manganese Carotenoids in fruits and vegetables also act as antioxidants. Cells have mechanisms other than antioxidents to help repair molecules (such as DNA)
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Unformatted text preview: that have been damaged by free radicals. A deficiency of vitamin E causes cell membranes to break down. Unsaturated fatty acids are very sensitive to attack by oxidizing compounds. When oxidative damage causes the cell membranes of red blood cells to break, it is called hemolysis . Vitamin E sources and needs Vitamin E is a family of four topherols: alpha beta gamma and delta Alpha tocerol- main form for the human body Gamma- main form in plants Vitamin E in plant oils- protects unsaturated fats from oxidation Animal fats and fish oils- practically no vitamin E Vtamin E is suseptable to destruction by oxygen, metals, light, and especially repeated use in deep-fat frying Vitamin E depends on how it was harvested processed stored and cooked RDA for adults- 15 milligrams of alpha-tocerol, the most active form of vitamin E. Equivalent to 22 IU of a natural source and...
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This note was uploaded on 04/25/2008 for the course NTR 108 taught by Professor Dehysschen during the Spring '08 term at SUNY Buffalo.

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VITAMIN E - that have been damaged by free radicals A...

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