Weider Nutrition Vitamin C is the purest form of vitamin C on the planet. Bodybuilders sprinters weightlifters & martial artists all attest to the fact that vitamin C is really probably the best natural supplement in the world. So what makes Weider Nutrition Vitamin C so special Well one of the biggest reason to use a vitamin C supplement is the fact that people who exercise are constantly using up huge amounts of vitamin C which needs to be replenished. There are various natural source