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Some vitamins, including multivitamins, have been shown to be beneficial in large, randomized clinical trials. Others have been shown to potentially cause harm . Many lie somewhere in between.
Most multivitamins contain vitamins A, D, E, K, C, B, calcium, ... “It is possible to consume unsafe levels of nutrients typically found in multivitamin supplements. To avoid this, choose a ...
There are also certain tolerable limits to certain vitamins and minerals—such as vitamin D, which has an upper limit of 25 mcg to 100 mcg for kids 0 to 18, depending on their age, according to ...
A multivitamin is a preparation intended to serve as a dietary supplement with vitamins, dietary minerals, and other nutritional elements. Such preparations are available in the form of tablets, capsules, pastilles , powders, liquids, gummies, or injectable formulations.
Vitamin C can be synthesized by some species but not by others. Vitamin B 12 is the only vitamin or nutrient not available from plant sources. The Food Fortification Initiative lists countries which have mandatory fortification programs for vitamins folic acid, niacin, vitamin A and vitamins B 1, B 2 and B 12. [9]
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 ...
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