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Vitamin A is a fat-soluble vitamin that is essential for cell growth, a healthy immune system, and perhaps most importantly, good vision. It comes from both animal and plant sources, and is also available in supplements. Vitamin A deficiency is rare in the United States, but is a common cause of blindness in developing countries.
Most people tolerate vitamin A supplements well. However, side effects may include:
  • Nausea and vomiting
  • Dizziness
  • Peeling of the skin.
While most people can safely take a multivitamin that contains a little vitamin A, high-dose supplementation can lead to toxicity. In addition, you should consult your healthcare provider before taking this product if you have liver disease, cirrhosis of the liver, or zinc deficiency.
(Click Vitamin A to read the full eMedTV article that features information on how it works, dosing guidelines, and more.)
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Last reviewed by: Arthur Schoenstadt, MD
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