Vitamin A is an antioxidant in the membranes of your cells where it serves a protective function. Every day you lose some vitamin A, because it is used in the replacement of old tissues.
Vitamin A is required by the eye for vision and it is also needed to protect the rest of your body from damaging effects of infection and stress.
High levels:
Too much vitamin A can be dangerous, particularly during pregnancy.
If your levels are too high, the recommended intake range will be zero. Betacarotene, which also protects tissue, is converted by your body to vitamin A on an as-needed basis. Supplementation with beta-carotene is a safer alternative than vitamin A.
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Lipid peroxides indicate damage to cell membranes from oxidation. 8-hydroxy-2’-deoxyguanosine measures the oxidative impact to DNA.
The lipid peroxide and 8-hydroxy-2’-deoxyguanosine levels will be high if your total antioxidant protection is inadequate. If these markers are high and vitamin A is normal, then either you need other specific antioxidants or you have a high rate of free radical oxidant production.
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