< b>Beta carotene: A vitamin that acts as an antioxidant, protecting cells
against oxidation damage. Beta carotene is converted by the body to vitamin A. Food
sources of beta carotene include vegetables such as carrots, sweet potatoes, spinach
and other leafy green vegetables; and fruit such as cantaloupes and apricots. Excessive
carotene in the diet can color the skin yellow, a condition called carotenemia.
Carotenemia is sometimes seen in infants fed too many mashed carrots and is a reversible
condition. Beta carotene supplements have been found not to reduce the risks
for cancer or heart disease.
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