Нужна ,нужно поставить в правлиную форму your body(to be) one powerful machine, capable of doing all sorts of things by itself. but one thing it can't do is make vitamins. your body(to get) vitamins it(to need) from the foods you(to eat) because different foods(to contain)different vitamins. though some people(to take) a daily vitamin, most of them(not to need) one if they(to eat) variety of healthy.