I take several vitamins and supplements every day. I really feel like they make a difference in my overall health. I feel great after I take them and there have been several studies about the benefits. I recently started bulking up so I have to start taking supplements to support this change. I have found some of the best supplements for muscle building online. The price and convenience can not be beat. I usually shop at the vitamin store a block away but I have found some great deals online too. Do your research and you should easily find some great supplements too.