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Vitamin A also supports the reproductive systems of men and women, research suggests. Vitamin A provides a host of health benefits, says Vanessa Spiller, a certified nutritionist based in Tysons ...
Vitamin A is found in many foods. [56] Vitamin A in food exists either as preformed retinol – an active form of vitamin A – found in animal liver, dairy and egg products, and some fortified foods, or as provitamin A carotenoids, which are plant pigments digested into vitamin A after consuming carotenoid-rich plant foods, typically in red ...
Diet – Liver is high in vitamin A. The liver of certain animals, including the polar bear, bearded seal, [25] [26] fish and [27] walrus, [28] are particularly toxic (see Liver (food) § Poisoning). It has been estimated that consumption of 500 grams (18 oz) of polar bear liver would result in a toxic dose for a human. [25]
Retinol, also called vitamin A 1, is a fat-soluble vitamin in the vitamin A family that is found in food and used as a dietary supplement. [3] Retinol or other forms of vitamin A are needed for vision, cellular development, maintenance of skin and mucous membranes , immune function and reproductive development. [ 3 ]
Animal livers are rich in iron, copper, B vitamins and preformed vitamin A.Daily consumption of liver can be harmful; for instance, vitamin A toxicity has been proven to cause medical issues to babies born of pregnant mothers who consumed too much vitamin A. [3] For the same reason, consuming the livers of some species like polar bears, dogs, or moose is unsafe.
These foods "are high in beta-carotene, the precursor to vitamin A and vitamin C, both essential nutrients to support a healthy immune system." She explained:
Rice-based baby foods like snack puffs had some of the highest levels of arsenic as well. The toxic element can lead to developmental defects, cardiovascular disease, neurotoxicity, diabetes and ...
Food and supplement labels still generally use IU, but IU can be converted to the more useful retinol activity equivalent as follows: [19] 1 μg RAE = 3.33 IU retinol; 1 IU retinol = 0.3 μg RAE; 1 IU β-carotene from supplements = 0.3 μg RAE; 1 IU β-carotene from food = 0.05 μg RAE; 1 IU α-carotene or β-cryptoxanthin from food = 0.025 μg ...