Gnc amp - men extreme training vitapak program improve performance & endurance: gnc amp men extreme training vitapak program features a clinically proven nutrient blend plus for athletic performance and increased endurance. Clinically proven multivitamin blend: this gnc multivitamin blend is clinically proven to work better than a basic multi at boosting levels of key nutrients that energy production and immune health^. Enhance circulation & blood flow: get ready to get pumped with l-arginine and clinically studied resvida resveratrol for nitric oxide production, circulation, and blood flow. Stay sharp in the gym: every pack includes ginkgo biloba to mental sharpness. Protect your muscles: clinically researched antioxidants defend against free radicals caused by intense workouts. Convenience & value: provides 5 products-in-1 at a better price than buying each separately. The daily packs are individually wrapped, making them convenient and easy for on the go. Quality you can trust: no artificial flavors. Contains clinically studied ingredients. How to take: take the contents of one pack daily with food. Do not take prior to bedtime. Gluten free ^in a randomized, double-blind, placebo-controlled study of 112 healthy participants, those taking the gnc vitamin and mineral blend for six weeks had statistically significant increases in serum levels of a group of b vitamins and a group of antioxidants and carotenoids based on a multivariate statistical analysis when compared to those taking placebo or a basic multivitamin. . Gnc amp men's extreme training vitapak program (30 servings) healthy - 30 day supply