You should go talk to a dietician to see if you actually need to take vitamins. If you're not deficient in anything, there's no reason to take them.
And also, if you do start taking them, make sure that you don't take any more than the recommended amount (usually 1 a day), because some vitamins become toxic in your system relatively easily.
And also, if you do start taking them, make sure that you don't take any more than the recommended amount (usually 1 a day), because some vitamins become toxic in your system relatively easily.