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How can vitamins help prevent a cold?

There is no reliable evidence that taking vitamins prevents the common cold or flu. Some people believe that taking large doses of vitamin C reduces the risk for the common cold. However, scientists have not been able to prove that vitamin C prevents colds.

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Should all vitamins and supplements I take be USP approved?
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.