NextGeneration Optygen Formula First Endurance continues to lead the endurance nutrition category by introducing OPTYGENHP, the nextgeneration of Optygen. This revolutionary formula is the result of human clinical trials and the latest scientific research on increasing endurance and performance. New features include BetaAlanine as well the most potent Rhodiola available. The two main adaptogens in OPTYGENHP were first used by Tibetan Sherpas to help them climb Mt. Everest. Optygen and OPTY
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