Our Mission

Fuel What


The Xendurance

Xendurance was founded in 1998 with the ambitious goal of transforming the Sports Nutrition landscape. Armed with decades of experience, both as athletes and health and wellness professionals, the founders focus on three traits to execute the Xendurance vision.

Scientific Efficacy. In a world of noise and misinformation, Xendurance chooses to support only those compounds backed by rigorous scientific research.

From the decade of independent research and clinically proven ingredients behind Extreme Endurance to the extensively researched Creapure® used in Creatine-JB, only those substances with proven efficacy have a place in our product line. Rather than make unsubstantiated claims, we continually ask third parties to test product performance with invariably positive results.


A Message from CEO

Get Moving!

Jason St. Clair

State-of-the-Art Manufacturing. Inconsistent manufacturing standards have plagued much of the Sports Nutrition industry with products relying on proprietary blends that don’t contain effective dosing or tainted with foreign substances. Our products are produced in controlled environments, only in Good Manufacturing Practice (GMP) certified and/or equivalent facilities.

Dedication to these NSF/ANSI standards, ensure the product you receive contains exactly the ingredients listed and nothing it shouldn’t. Xendurance partners with LGC, the largest independent sports drug laboratory in the world, to certify products free of banned substances.

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Accessibility for All. In the supplement and nutrition industry it is difficult to find supplementation that is scientifically proven and reliably manufactured.

Xendurance strives to support the publication of scientific research and make our product line available to athletes of all abilities. The health and performance benefits of our proprietary compounds are not just for professional athletes, but can have a positive impact on the wellness of every active person.

As a company, Xendurance continues to make these three tenets a priority in our ongoing mission for superior Sports Nutrition & Elite Health. Proven, Clean, and Accessible products to make an impact on your health and performance.