Endurance MultiV is the first multinutrient vitamin thatís clinically proven to enhance endurance. This unparalleled formulation contains a number of special ingredients that address the unique requirements of endurance athletes. In addition to having the highest-quality, most bio-available vitamins and chelated minerals available, this special endurance formula delivers clinically effective doses of enzymes, iron, Green Tea, Ginkgo Biloba and Omega-3 Fatty Acids. Endurance MultiV is formulated with Ferrochel Iron-a highly bioavailable source of iron which is non-toxic and does not affect the absorption of minerals, like other iron sources. MultiV is the only multivitamin that contains CarbogenÆ (U.S. Patent 5,817,350), a patented enzyme blent that's been clinically proven to increase time to exhaustion by 43%, reduce lactate levels by 58% and improve carbohydrate utilization.