First Endurance OptygenHP Flavor:Plain This helps prevents sleep disruptions

This helps prevents sleep disruptions from light to mild muscle discomfort that athletes often have after a hard workout

a calm mind

you don't need to hold it in your mouth

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First Endurance OptygenHP Flavor:Plain This helps prevents sleep disruptionsFirst Endurance names this "the ultimate endurance supplement." Why? The OptygenHP is the new and improved Optygen formula and features their exclusive OptyMax Proprietary Matrix. Clinical research on elite endurance athletes shows an increase in VO2max, an increase in the bodys ability to adapt to high levels of physical stress, an increase in anaerobic threshold, and a reduction in lactic acid. These studies showed: A 26% decrease in cortisol levels