What you do need is vitamins and minerals in there natural form....say I don't know.....FROM FOOD! When you eat real food you get everything you need - vitamins, minerals, water, enzymes etc, and your body says, "thanks buddy," and breaks it down and sends it to where it needs to go.
When you take isolated synthetics it is akin to throwing water on your computer - your body says, "what the hell?," and proceeds to utilize more internal energy to get rid off the garbage that you just gave it--leaving you with less vitality than you had before you started. Uh-oh!
When it comes to supplements remember this - "What part of your watch tells time?" Answer - the whole watch....same goes for your body, so save the money you were going to spend on those supplements and put it into more high quality food! Rant over!