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Do vitamin supplements and multivitamins actually work?

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What do Multivitamins Contain? There are 13 vitamins and at least 16 minerals that are essential to health. Many of them participate in enzymatic reactions in the body, or function as hormones, signalling molecules or structural elements. read more

Vitamin D toxicity is extremely rare, and is unlikely to happen from multivitamin use. However, vitamin A toxicity does occur from time to time (33, 34, 35). If you eat a lot of nutrient-dense foods and then add a multivitamin on top of that, you can easily exceed the recommended daily intake of many nutrients. read more

The studies, published in the Dec. 17 issue of the journal Annals of Internal Medicine, found that multivitamin and mineral supplements did not work any better than placebo pills. Dietary supplements are a multibillion-dollar industry in the United States, and multivitamins account for nearly half of all vitamin sales, according to the U.S. Office of Dietary Supplements. read more

Exceptions include vegetarians, people who have trouble absorbing B12, and women who are or may get pregnant (they need extra folic acid from a prenatal vitamin or other supplement). Possible risks: High doses of folic acid can mask B12 deficiency. read more

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