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Another pigment found in the leaves of many plants is carotene. Carotene absorbs blue-green and blue light. The light reflected from carotene appears yellow. Carotene is also a large molecule (C 40 H 36) contained in the chloroplasts of many plants.
Carotenoids are a class of more than 750 naturally occurring pigments synthesized by plants, algae, and photosynthetic bacteria (1). These richly colored molecules are the sources of the yellow, orange, and red colors of many plants. Fruit and vegetables provide most of the 40 to 50 carotenoids found in the human diet. Î±-Carotene, Î²-carotene, Î²-cryptoxanthin, lutein, zeaxanthin, and lycopene are the most common dietary carotenoids (1).