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  1. Vitamin A 
    https://medlineplus.gov/vitamina.html
    Vitamin A is an antioxidant. Vitamin A plays a role in your vision, bone growth, reproduction, cell functions and immune system. ... your body needs to grow and develop normally. Vitamin A plays a role in your: Vision Bone growth ...
  2. Vitamin A 
    https://ods.od.nih.gov/factsheets/VitaminA-Consumer
    ... Supplement Fact Sheets > Vitamin A > Vitamin A - Consumer Vitamin A and Carotenoids Fact Sheet for Consumers Have a ... see our health professional fact sheet . What are vitamin A and carotenoids and what do they do? Vitamin ...
  3. MedlinePlus Drug Information: Vitamin A 
    https://medlineplus.gov/druginfo/meds/a621028.html
    Vitamin A is used as a dietary supplement when the amount of vitamin A in the diet is not enough. People most at risk for vitamin A deficiency are those with a limited variety of ...
  4. Hypervitaminosis A 
    https://medlineplus.gov/ency/article/000350.htm
    Vitamin A toxicity ... Vitamin A is a fat-soluble vitamin that is stored in the liver. Many foods contain vitamin A, including: Meat, fish, and poultry (egg yolks) Dairy ...
  5. Vitamin A 
    https://medlineplus.gov/ency/article/002400.htm
    Vitamin A is a fat-soluble vitamin that is stored in the liver. There are two types of vitamin A that are found in the diet. Preformed vitamin A is found in animal products such as meat, ...
  6. Vitamin A blood test 
    https://medlineplus.gov/ency/article/003570.htm
    The vitamin A test measures the level of vitamin A in the blood. ... if you have too much or too little vitamin A in your blood. (These conditions are uncommon in ...
  7. Workgroup Exercise - Issues and Challenges in Conducting Systematic Reviews to Support Development of Nutrient ... 
    https://www.ncbi.nlm.nih.gov/books/NBK44080
    ... of vitamin A (Appendix E). Analytic Framework for Vitamin A Reference Value Discussed in this section are two ... systematic reviews of the key questions. Specific Example - Vitamin A Requirement Figure 3 shows an example of a ...
  8. Vitamin A benefit (image) 
    https://medlineplus.gov/ency/imagepages/18096.htm
    Vitamin A, also known as retinol, is essential to the formation of visual purple in the retina, which ... in dim light. Beta carotene, the precursor to vitamin A found in vegetables, has antioxidant properties, which means ...
  9. Vitamin A source (image) 
    https://medlineplus.gov/ency/imagepages/18097.htm
    Like most vitamins, vitamin A may be obtained in the recommended amount with a well-balanced diet, including some enriched or fortified foods.
  10. Definitions of Health Terms: Vitamins 
    https://medlineplus.gov/definitions/vitaminsdefinitions.html
    ... National Institutes of Health, Office of Dietary Supplements Vitamin A Vitamin A plays a role in your vision, bone growth, reproduction, cell functions, and immune system. Vitamin A is an antioxidant. It can come from plant ...
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