维生素狂热 Vitamania: The Sense and Nonsense of Vitamins

　　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 these products? Is it true that vitamins are “natural” and therefore can’t do you an...