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Xendurance
Goodbye Soreness
Hello Performance
GOODBYE SORENESS
HELLO PERFORMANCE
Increase Performance
Improve Power & Vo2 Max 10-25%
Recover Faster
6X Reduction of Creatine Kinase
Less Muscle Soreness
26% Reduction in Lactic Acid
Endorsed by:
Trusted by
World Class Athletes
Proven In
12 Clinical Studies
Recover Faster
Fights free radical damage & supports crucial cellular functions.
Stamina Increase
Push your limits to go the distance, fight fatigue and set PRs.
Increase Power
Increase power output by 10-25% with a similar heart rate.
Deeper Breaths
Increase VO2 Max & Aerobic Threshold. Perform better for longer.
Deeper Breaths
Increase VO2 Max & Aerobic Threshold. Perform better for longer.
Reduce Lactic Acid
Extreme Endurance reduces lactic build up after intense workouts.
Age Slower
Promotes anti-aging by reducing damaging oxidative stress.
As proven in:
Journal of Athletic Achievement (2016)
ENA Conference, Vienna Austria (2010)
ENA Conference, Vienna Austria (2010)
Journal of Athletic Achievement (2016)
How to
Improve in 72 Hours
Perform a baseline workout.
Take 3 tablets in the AM and repeat in the PM. Train regularly.
Feel benefits in 72 hrs and redo baseline workout.
Test with the
ONE WEEK CHALLENGE
Perform a baseline workout
Take 3 tablets in the AM & PM.
Train regularlyRedo baseline workout in 7 days + feel the results
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60 Day Starter Pack
$183.85$119.90
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Experience the World’s #1 Supplement for Stamina, Performance & Recovery.
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FREE $25 Gift Card
2 x Packs of Extreme Endurance
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Reviews
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Over 10+ years
Customer Reviews
Based on 1747 reviews87%(1528)5%(93)2%(39)1%(23)4%(64)JAmazing product!Was skeptical to buy this product but had been really struggling with breathing and building any type of endurance back up since a surgery I had at the beginning of 2024. I have been floored with the growth and results I have experienced since taking it!
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Thank you for sharing your positive experience with Extreme Endurance! We are thrilled to hear that it has exceeded your expectations and helped you improve your breathing and endurance after your surgery. We always strive to provide products that truly make a difference for our customers. We hope that you'll continue to use it to help improve your overall fitness and well-being! Keep up the great work!
TThe Essentials AdvantageThroughout the week, I blend a balanced load of core circuit training, running, walking & handball (indoor & outdoor). Before taking Essentials 2x daily, my joints would be achy & sore. Now my body recovers quickly & w/ discomfort!
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Awesome! Thank you for taking the time to leave a review for our product, Essentials. We're thrilled to hear that it has helped you with your active lifestyle and recovery. Our goal is to provide our customers with the best support for their joints and overall well-being. Keep up the great work!
DThe next level you need to unlock your full potential.Energy sustained with tier A performance. Definitely Essential in my progression. My secret is exendurance. No soreness or cramps. All work and strength 💪🏿 I do kickboxing amd crossfit 6 days a week both classes for 5 days and this has been a next level to seeing progress...
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Thank you for choosing Extreme Endurance! We are thrilled to hear that it has helped you unlock your full potential and sustain your energy with top-tier performance. Cheers to no more soreness or cramps. Keep pushing to the next level!
SIncredible!I was a skeptic trying this…but after only a week I noticed a major improvement in my VO2 and stamina. I’ll be interested to see the long term results given only a week’s success.
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Thank you for your review! We're thrilled to hear that Extreme Endurance has made a positive impact on your VO2 and stamina after just one week. We're confident that with continued use, you'll see even more impressive long-term results. Keep up the great work!
LLil bitI have just started using this product and so far I’ve seen fatigue starting later in my run.
I am looking forward to more experience with this item with more use, right now I’ve seen enough improvement to continue using it regularly.
Got to be all in not just a lil bit in.![User picture]()
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Thank you for taking the time to leave a review for our Extreme Endurance product. We're glad to hear that you've already noticed a difference in your energy levels during your runs. We're confident that with continued use, you'll experience even more benefits. Keep up the great work!
DIt took about a week to notice but I definitely have more stamina. I’m training for a 1/2 marathon & has really helped on my distance runs.
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Supplement facts
NON-GMO / Gluten Free / Preservative Free.
Contains no Yeast, wheat, corn, milk, eggs, soy, artificial colors, sugar, starch or flavorings.
100% Guaranteed
Backed by the XND 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
60-Day Money
Back Guarantee
FAQS
How quickly will I see results with Extreme Endurance?
Extreme Endurance will be in your system and working within 48-72 hours. We can confirm this from 12+ years of clinical testing.
Can I take Extreme Endurance with other supplements?
Extreme Endurance can be taken together with almost every other supplement but you do not need to take any product containing Beta Alanine when taking Extreme Endurance.
Please reach out to info@xendurance.com for specific inquiries.Do I need to take Extreme Endurance with food?
You do not need to take Extreme Endurance with food.
Is Extreme Endurance certified drug free?
Extreme Endurance was the very first US sports nutrition supplement certified drug free by LGC; Informed Sport.
LGC is a world-renowned sports doping control and research laboratory, with over 50 years of expertise in anti-doping in sport. LGC has published over 300 scientific papers on methods for the detection of trace levels of substances that are prohibited in sport and has over 450 man-years of research into doping control.
LGC has been testing supplements and ingredients on behalf of reputable manufacturers and suppliers for over 15 years. It has tested tens of thousands of samples during this time and has also carried out a number of research studies to explore the prevalence of contamination with prohibited substances in products and ingredients.
LGC's research into supplements and contamination also includes several administration studies to investigate the levels of prohibited substances that could cause an athlete to fail a doping test. These have been published in peer-reviewed scientific journals. As a doping control laboratory, LGC works directly with sports authorities, national anti-doping organizations, and national governing bodies worldwide.
Is Extreme Endurance certified drug free by the NCAA?
There are no NCAA approved supplement products. The NCAA does not approve supplements. Since 2007, Xendurance has had thousands of NCAA student-athletes take Xendurance products and rely on the Informed-Sport certification which is a global testing method for banned substances. To learn more please find the Informed-Sport link.
Can Extreme Endurance be taken with caffeine?
Over the years we have found that some people have a very acidic diet and their diet may interfere with the dissolution of the product in the small intestine. On the other hand, one of our athletes drinks 12 cups of coffee per day and lives on Extreme Endurance with great results! Everyone is different but the few that have had issues cleared up the dissolution problem by limiting acidic drinks, red meat, and coffee when taking Extreme Endurance.
We now encourage people to take their caffeine within an hour prior to or after taking their tablets just as a precaution.Do I need to cycle off Extreme Endurance?
You don’t cycle with Extreme Endurance. You take it consistently, like a multivitamin; for training, performance, heart-lung function, and for better body pH and alkalinity.
Can an athlete take Extreme Endurance if under the age of 18?
We encourage a parent to email info@xendurance.com and provide the sport and activity level of their child and their age, and weight. We can then provide better guidance for the parent as to the experience we have seen with athletes using the product under the age of 18. We do not recommend anyone under the age of 14 use Extreme Endurance.
When should you take Extreme Endurance? What time of day?
The most important thing to remember when taking Extreme Endurance is to take it consistently like you would a multivitamin. You can split the morning and evening dosage to the time of the day that works best for you. Ex; If you take it at 6 am and 5 pm, we encourage you to try to take it around 6 am and 5 pm everyday. You can take it with or without food.
What is a “Load Dose”?
The normal dose of Extreme Endurance is 6 tablets per day: 3 in the morning and 3 in the evening. For athletes that will be having a significant event or an “extreme” event such as an ultra-distance race, a state meet, or an event that is more intense than your normal events, we recommend what is called a “load dose”. A load dose is taken 7-10 days out from the event and you increase the dosage to 8 tablets per day: 4 in the morning and 4 in the evening and you take 8 tablets for one day after the event and then drop back down to the normal dose of 6 tablets per day. In 2008, our pro-triathletes started using a load dose and they informed us they had their best results bumping up their dosage, so this is why we tell competitors in every sport to use the load dose.
What sports will benefit from using Extreme Endurance?
Since 2008 we have heard from every type of athlete, in every type of sport with the exception of “curling”. We are still waiting for a curler to come forward. So if you are a curler we want to hear from you! Runners, Ultra-distance, Marathon, Triathletes, Crossfit, Cycling, Jiu Jitsu, Swimming, Tennis, Golf, Surfing, Football, Basketball, Baseball, Motorcross, Paddleboarding, Skiing, Boxing, Rugby, Rock Climbing, Wrestling, Hockey - just not curling yet....
Hello Performance
Train Unfair.
Stop making excuses. Recover faster and perform at your best.
Proudly owned, manufactured and shipped in the USA, since 1998.
Get in touch: info@xendurance.comCompany Policies
