叶黄素就是其中一种鲜明的黄色，而番茄红素是一种使得西红柿变红的类胡萝卜素。
Lutein is one that's a bright yellow. And lycopene is the carotenoid that makes tomatoes red.
类胡萝卜素的混合物较单种物质的效果好，并且这种协同效应在有番茄红素和叶黄素时被加强。
Mixtures of carotenoids were more effective than the single compounds and this synergistic effect was most pronounced when lycopene or lutein was present.
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