A varied diet provides sufficient quantities of everything needed. I wouldn't supplement without a doctor identifying an ailment or deficiency, and then I'd prefer a diet change or even a prescription to a supplement. There's too much research (see: SELECT trials) that supplements feed tumorogensis and cancer mortality, and that the supplements you buy may not actually be what you think you're buying (see: http://www.nytimes.com/2013/11/05/science/herbal-supplements...).