The maximum amount that can be in one vitamin pill or tablet is the Tolerable Upper Intake Level (UL).
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Q. 2There is strong evidence that exercise substantially increases the need for most vitamins.
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Q. 3Both low and high levels of antioxidant vitamins are harmful but for different reasons.
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Q. 4After tissues are saturated with water-soluble vitamins, any excess is excreted and no toxicity symptoms have been reported.
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Q. 5The fat-soluble vitamins are vitamins A, D, E, and K.
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Q. 6The large majority of studies in adults show that vitamin C supplementation reduces the incidence and duration of colds.
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Q. 7The roles that vitamins play in energy production are indirect rather than direct.
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Q. 8Each vitamin plays specific roles in the body that cannot be replaced or substituted by other vitamins.
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