Xendurance is a sports nutrition company that was started in the USA in 2006 when the formula, Xendurance (Extreme Endurance in the USA) was under development. The parent company, Lifespan International US., is located in Carefree, Arizona. Lifespan’s goal was to develop an all-natural, drug-free product, which would improve an athlete’s performance by improving both aerobic and lactate acid threshold. Xendurance also wanted to develop a formula that would safely reduce the “culprit” known as lactic acid.

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