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How do I know how much of a specific vitamin I need each day?

Howard S. Smith
Pain Medicine
In 1997, the Food and Drug Administration switched from using the Recommended Dietary Allowance (RDA) to the Recommended Daily Intake (RDI). If you do take vitamins, start with a multiple vitamin-mineral capsule that has RDI. This amount is the average daily dietary intake level that is sufficient for healthy adults. If you have more specific vitamin/mineral needs, talk with a registered nutritionist for expert advice.

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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.