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National Institutes of Health: “Vitamin A Fact Sheet for Health Professionals,” “Vitamin A Fact Sheet for Consumers,” “The importance of beta-carotene as a source of vitamin A with special regard to pregnant and breastfeeding women.”
Oregon State University Micronutrient Information Center: “Overview of the Immune System.”
World Health Organization: “Vitamin A fortification of staple foods.”
Reviewed by Melinda Ratini, DO, MS on July 11, 2016
This tool does not provide medical advice. See additional information.
THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.
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