维生素,又称维他命,适量摄取可保持身体健康,而过量则会中毒。维生素已成为价值千亿美元的产业,Derek Muller博士讲述维生素的科学和历史,以及怎样合理摄取。, Almost one billion of us take a regular dietary supplement, mainly vitamin tablets. Vitamins are enthusiastically endorsed by celebrities, and vitamin-fortified foods line our supermarket shelves., But how safe are th...