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Company details

  1. Beauty & Well-being

Information provided by various external sources

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, Xendurance LLC., is located in Arizona. Xendurance LLC'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. Lifespan International recognised that athletes not only benefit from performance products but they also need to protect their health and immune systems from the trauma of rigorous training schedules. With that in mind, Xendurance LLC continuously expands the Xendurance product line of power-packed multi-vitamins, omega and joint formulas, protein and electrolyte drinks, with unique formulas backed by science. What distinguishes Xendurance from other sports nutrition companies is that the we showcase product, Xendurance, has a twp published, Gold-Standard, third party, double-blind, placebo-controlled, crossover study. Many companies make substantial claims on individual ingredients, but Xendurance has a published study on the complete formula, not just the ingredients.“Third party” testing is also important because it means that Lifespan International did not know or hire the actual facility that did the testing therefore no bias was influencing the outcome of the study.


Contact info

2.6

Poor

TrustScore 2.5 out of 5

12 reviews

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Hasn’t replied to negative reviews

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Rated 2 out of 5 stars

Don't waste your money on the membership

The products are good, but the way their membership works is not. I purchased a 12 month membership in May of 2025 and have since canceled it so that it doesn't auto-renew. I attempted to make a purchase, expecting the reduced pricing the membership offers, only to be told that since I canceled my membership, I no longer am eligible for the reduced pricing. So I effectively was charged $95 for 12 months of membership that they did not honor.

January 21, 2026
Unprompted review
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Rated 5 out of 5 stars

High-quality supplements to support…

High-quality supplements to support sports performance and health - couldn't rate them highly enough and now a staple part of my routine. Quick service and delivery!

June 22, 2020
Unprompted review
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Reply from Xendurance

Thank you Amy!

Rated 5 out of 5 stars

I started using xendurance products a…

I started using xendurance products a little over a year ago now. I have tried so many different nutrition brands over the years as an athlete and I can honestly say I met my match when I was first introduced to Xendurance. I find their products to be light on the stomach and easily digestible, something I have struggled with find with other nutrition companies. They are different to other brands in that they have the emphasis on lactate as the energy source. Each product that arrives always come with a detailed description of what is in it and the benefits of using it as well as when the product should be consumed around training. The Immune health and Xendurance tablets I now take daily and I have found to be a huge benefit during harder training weeks, to support the function of my immune system. Great service always, my products arriving withing a 5-7 day window and a very good response time from the team with any queries I may have. Would highly recommend Xendurance!

June 22, 2020
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Rated 5 out of 5 stars

Awesome customer service and quality products

Can honestly say one of the key elements to a good company is customer service, these guys are brilliant, quick delivery and the occasional freebie thrown in just add to the all round service received, the products are quality, all industry tested and work. Definately recommend.

June 12, 2020
Unprompted review
Rated 5 out of 5 stars

incredibly fast delivery

incredibly fast delivery. love that you guys constantly look at new products and avenues to support endurance athletes. Both professional and aspiring!

June 12, 2020
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Rated 5 out of 5 stars

Vegan protein

I bought the vegan protein and is so far the best one I tried. It mix well and it test okay(for Vegan protein)

June 12, 2020
Unprompted review
Rated 5 out of 5 stars

Top products!

Great products. Palatable but also doing what they say on the tin. I tend to suffer with certain high sugary sports drinks but Xendurance I absorb well.

June 12, 2020
Unprompted review

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