first to deliver all five of the key electrolytes (Sodium, Potassium, Chloride, Magnesium and Calcium) in the advanced levels that endurance athletes require,? commented Robert Kunz, Sr. VP of Research and Development, First Endurance. ?E3 is also fortified with clinically effective doses of Glutamine and Branched Chain amino acids. No other formula even comes close.? All First Endurance products come with a certificate of analysis and have been independently tested and reviewed by outside boards including SupplementWatch.com. First Endurance is the proud sponsor of Freddie Rodriguez seen here , the Navigators,
Sierra Nevada and Webcor professional cycling teams and the US Telemark Ski Team.