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carotene
(kar´ә-tēn)
a yellow or red pigment found in many dark green, leafy, and yellow vegetables such as collards, turnips, carrots, sweet potatoes,
and squash, as well as in yellow fruit, milk, egg yolk, and body fat. It exists in four forms (α-, β-, γ-, and δ-carotene),
all of which can be converted into vitamin A in the body.
beta carotene
the β isomer of carotene.
a preparation of this substance administered orally to prevent vitamin A deficiency, and to reduce photosensitivity in patients with erythropoietic protoporphyria. Written also betacarotene and β-carotene.
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