类胡萝卜素

类胡萝卜素是一种有机色素，天然存在于植物和某些其他光合生物（如藻类，某些类型的真菌和某些细菌）的叶绿体和染色体中。
There are over 600 known carotenoids;有超过XNUMX种已知的类胡萝卜素。 they are split into two classes, xanthophylls (which contain oxygen) and carotenes (which are purely hydrocarbons, and contain no oxygen).它们分为两类，叶黄素（含氧）和胡萝卜素（纯烃，不含氧）。 Carotenoids in general absorb blue light.类胡萝卜素通常吸收蓝光。 They serve two key roles in plants and algae: they absorb light energy for use in photosynthesis, and they protect chlorophyll from photodamage.它们在植物和藻类中起着两个关键作用：它们吸收光能用于光合作用，并保护叶绿素免受光害。 In humans, carotenoids such as β-carotene are a precursor to vitamin A, a pigment essential for good vision, and carotenoids can also act as antioxidants.在人类中，类胡萝卜素（例如β-胡萝卜素）是维生素A（视力良好的必需色素）的前体，类胡萝卜素也可以充当抗氧化剂。