由于生活水平的提高,人们往往喜欢吃精制的米、面,很少或不吃糙米和其他粗粮。从营养学观点看,这样的饮食是不合理的。因为糙米、粗面、杂粮等比精制的米、面含有更多的维生素、矿物质及纤维素,而米、面虽加工精细,但维生素损失也较多。如1公斤糙米中含维生素B134毫克,而50公斤 Due to the improvement of living standards, people often like to eat refined rice, noodles, with little or no brown rice and other coarse grains. From a nutritional point of view, such a diet is unreasonable. Because brown rice, rough, miscellaneous grains and other refined rice, noodles contain more vitamins, minerals and cellulose, and rice, although the surface processing fine, but more vitamin loss. Such as 1 kg of brown rice contains vitamin B134 mg, while 50 kg