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JOIN 300,000+ CUSTOMERS
4.9/5.0 (1,000+ Reviews)
26% Reduction of Lactic Acid = Less Muscle Soreness
39% Reduction of Oxidative Stress = Improves Performance
6x Reduction of Creatine Kinase (CK) = Muscle Recovery
Increase in Aerobic Threshold = Better Vo2 Max
Benefits within 72 hours
Certified by Informed-Sport
As seen on
TRUSTED BY WORLD CLASS ATHLETES
3x CROSSFIT GAMES ATHLETE
FORMER NAVY SEAL & CROSSFIT GAMES ATHLETE
800M OLYMPIC BRONZE MEDALIST
800M WORLD RECORD HOLDER
PROVEN IN 12 CLINICAL STUDIES
RECOVERY TIME IMPROVEMENT
The intense and rigorous workouts we do in the gym can take their toll on our bodies. Our muscles might be sore for days after, which is why it's so important to recover properly.
You can never have too much stamina. Extreme Endurance helps you push your limits and go the distance, fight fatigue and Set PRs
Increase power output by 10-25% with a similar heart rate
Proven to increase VO2 Max and Aerobic threshold.
OTHER ENDURANCE PRODUCTS
TIME TO BENEFITS
REDUCES MUSCLE TRAUMA
INCREASES LACTATE THRESHOLD
CERTIFIED DRUG FREE
Recover Faster, Live Better
Fights free radical damage & supports crucial cellular functions
Promotes anti-aging by reducing damaging oxidative stress
Increases aerobic threshold and VO2 max for a longer, healthier life
Starts working within 48–72 hours
100% Guaranteed & Backed by the Xendurance Promise
Scientific Efficacy: Proven by rigorous scientific research and tested by unbiased 3rd parties.
State-of-the-Art Manufacturing: We only partner with Good Manufacturing Practice (GMP) certified and/or equivalent facilities.
Accessibility for All: We strive to make our product line available to athletes of all abilities!
Certified Drug Free By Informed Sport: 3rd party tested to guarantee free of banned substances
HOW IT WORKS
Take 3 tablets in the morning & 3 tablets at night
Feel the benefits in 72 hours, compare against previous workouts
JOIN 300,000 CUSTOMERS OVER 10+ YEARS
Benefits You Will Feel.
26% Reduction of Lactic Acid
Less Muscle Soreness
Reduction of Oxidative Stress
Set New PRs
+ V02 Max
6x Reduction of Muscle Trauma
Better Muscle Recovery
THE PERFORMANCE KIT
Save $31 + Free $10 Gift Card
Any athlete or weekend warrior like you works out to push the limits and reach new heights. We’ve developed a super-supplement to help power your along the way, allowing you to train longer and harder with less damage and strain.
10% OFF Extreme Endurance (60 Day Supply)
50% OFF Omega+D3
FREE $10 Gift Card
60 Day Guarantee
60 Day Guarantee
XENDURANCE Founder: Sandy Kellin
Jesse Owens was recognized in his lifetime as "perhaps the greatest and most famous athlete in track and field history"
Pictured to the left of this Olympic flag is Sandy Kellin, Founder of Xendurance. Sandy’s USA Bobsledding pursuits in 1980 led him to a meeting with Jesse Owens. Jesse supported Sandy’s efforts in going for Gold through fund raising and providing much needed international travel contributions.
When Jesse sadly passed away, Sandy was contacted to provide an Olympic Flag to honorably drape the casket when Jesse was laid to rest in the Arizona State Capital. This precious flag now hangs in the corporate offices of Xendurance, located in Scottsdale, AZ.
To share this memory is nothing compared to what Jesse Owens shared with the world. We must never forget what Jesse did for all sports and for the giving nature he gave to everyone who reached out for help.