混合类胡萝卜素是由叶黄素、新叶黄素、紫黄质和β－胡萝卜素等主要成分合成的暗黄棕色液体。
叶黄素是一种活性类胡萝卜素，它是天然的抗氧化剂重要来源，取自万寿菊花，它含有一种纯混合类胡萝卜素：玉米黄质和隐黄质。
Lutein is an active carotenoid and potent natural source antioxidant. It is extracted from marigold flowers and contains a normal blend of carotenoids including: zeaxanthin and cryptoxanthin.
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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