Higher vitamin C intake: saturation and possible benefits

THE CONTEXT

The passage distinguishes saturation of vitamin C metabolism from its effects within the gut and the limited evidence concerning the common cold.

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At intakes above about 100 mg/day, the body's capacity to metabolize vitamin C is saturated, and further intake is excreted in urine.

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Vitamin C enhances inorganic iron absorption, and this effect depends on its presence in the gut.

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Increased intake may therefore be beneficial, and vitamin C is frequently prescribed with iron supplements to treat iron deficiency anemia.

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There is very little good evidence that high doses of vitamin C prevent the common cold.

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High doses may reduce the duration and severity of symptoms.

NEETx

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