Xendurance is a sports nutrition company founded in the U.S. in 2006 when the formula Xendurance was under development. The parent company, Lifespan International US, located in Carefree, Arizona, set out to develop an all-natural, drug-free, product which would improve an athlete's performance by improving both aerobic and lactic acid threshold. Lifespan International recognizes that diet and training is essential to every athlete and active person, and with proven science, sports nutrition can dramatically add to the complete package for optimum performance, no matter the sport. With that in mind, Lifespan International continuously expands the Xendurance product line with products that compliment any training regimen providing proteins, pre and post workout formulas, electrolyte drinks, power-packed multi-vitamins, omega and joint formulas. Xendurance continues to be on the forefront of using this science and success in providing sports nutrition to athletes in every sport and on every level.