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Hypervitaminosis A results from excessive intake of preformed vitamin A. Genetic variations in tolerance to vitamin A intake may occur, so the toxic dose will not be the same for everyone. [23] Children are particularly sensitive to vitamin A, with daily intakes of 1500 IU/kg body weight reportedly leading to toxicity. [21]
Long-term use of zinc in high doses, for example, can cause a copper deficiency; high doses of vitamin A shouldn’t be taken during pregnancy because it can hurt the fetus; and excessive vitamin ...
Hypervitaminosis is a condition of abnormally high storage levels of vitamins, which can lead to various symptoms as over excitement, irritability, or even toxicity. Specific medical names of the different conditions are derived from the given vitamin involved: an excess of vitamin A, for example, is called hypervitaminosis A.
Vitamin A deficiency is rare in the United States, where most people get enough from food sources. Adults shouldn’t have more than 3,000 mcg per day; if excessive vitamin A builds up in the ...
Prenatal vitamins typically contain increased amounts of folic acid, iodine, iron, vitamin A, vitamin D, zinc, and calcium over the amounts found in standard multi-vitamins. [4] Currently there is insufficient evidence that zinc supplements during pregnancy result in improved neonatal or maternal outcomes. [ 23 ]
For example, many [citation needed] prescription prenatal vitamins will contain a more bioavailable form of folate, 5-methyltetrahydrofolate (5-MTHF). Doses of folic acid over 1 mg are prescription only. The amount of non-prescription prenatal vitamins needed to achieve this dose may have too much vitamin A and lead to fetal toxicity. [2]
During pregnancy, biotin is an ... Biotin is a water soluble vitamin, meaning “when there's an excess supply, it's excreted through the urine,” says Hemeida. Overall, biotin is considered to ...
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 ]
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