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Both deficient and excess intake of a vitamin can potentially cause clinically significant illness, although excess intake of water-soluble vitamins is less likely to do so. All the vitamins were discovered between 1913 and 1948. Historically, when intake of vitamins from diet was lacking, the results were vitamin deficiency diseases.
In the United States, a multivitamin/mineral supplement is defined as a supplement containing three or more vitamins and minerals that does not include herbs, hormones, or drugs, where each vitamin and mineral is included at a dose below the tolerable upper intake level as determined by the Food and Drug Board, and does not present a risk of ...
When you buy a bottle of vitamins from a nutrition store, you’ll probably notice a best-by date on the bottom of the jar. But that inscribed number isn’t a hard-and-fast rule—there is some ...
Many of the vitamins and minerals on the market are generally safe, if not always effective, and the agency does have the authority to request a recall if a product causes adverse side effects ...
[2] [4] Plants do not need cobalamin and carry out the reactions with enzymes that are not dependent on it. [5] Vitamin B 12 is the most chemically complex of all vitamins, [6] and for humans the only vitamin that must be sourced from animal-derived foods or supplements. [2] [7] Only some archaea and bacteria can synthesize vitamin B 12. [8]
Vitamins, minerals, fiber, [9] and water do not provide energy, but are required for other reasons. A third class of dietary material, fiber (i.e., nondigestible material such as cellulose), seems also to be required, for both mechanical and biochemical reasons, though the exact reasons remain unclear.
2. Vitamin B12. One of eight B-complex vitamins, vitamin B12 is found naturally in some types of fish, red meat and fortified foods.It plays a key role in central nervous system function, DNA ...
Compared to plant sources, animal-sourced foods do not provide so great an amount of vitamin C, and what there is is largely destroyed by the heat used when it is cooked. For example, raw chicken liver contains 17.9 mg/100 g, but fried, the content is reduced to 2.7 mg/100 g. Vitamin C is present in human breast milk at 5.0 mg/100 g. Cow's milk ...
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