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The carotenoids, including [[beta-carotene]], alpha-carotene, and [[lycopene]], are [[vitamin A]] precursors. These pigments produce yellow, orange, red, and dark green in fruits and vegetables. * Alpha-carotene produces half the vitamin A that beta-carotene does. Alpha-carotene is found in similar foods to beta-carotene and is often studied in conjunction with that carotenoid, though it is rarer and less well-understood. <br>