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Vitamin A

by Jerry Kennard
for About.com

Updated July 22, 2005

About.com Health's Disease and Condition content is reviewed by the Medical Review Board

Vitamin A (retinol)
Vitamin A is found in fish, vegetables, eggs, milk, cheese, butter and liver. It is important for healthy bones, lining tissues, the immune system, vision and skin. Vitamin A has a role in protectin against cancer. Deficiency of vitamin A can lead to faulty and slow development of bones and teeth, dry eyes and night blindness, and poor skin and hair. An excess of vitamin A can cause intense sleepiness, enlarged liver and spleen, loss of appetite, headache, nausea and skin irritability. The recommended daily intake of vitamin A is 1 mg RDA.

Back to the Essential Guide to Vitamins

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