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This new and improved OptygenHP formula is the strongest Optygen formula available. It contains Rhodiola that's twice as strong as the original OptygenHP formula. OptygenHP also contains Beta-Alanine because clinical research has shown it increases exercise capacity and muscular strength. The two main adaptogens in OptygenHP (rhodiola and Cordyceps CS-4) were first used by Tibetan Sherpas to help them climb Mt. Everest. Optygen and OptygenHP utilize these two unique adaptogens because clinical research on elite endurance athletes has shown them to: