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


Perform a baseline workout

Take 3 tablets in the AM & PM.
Train regularly

Redo baseline workout in 7 days + feel the results



60 Day Money Back Guarantee

60 Day Starter Pack



SAVE $63.95

Experience the World’s #1 Supplement for Stamina, Performance & Recovery.

Try the 60 Day Pack and get:

FREE Omega+D3

FREE $25 Gift Card

2 x Packs of Extreme Endurance

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Join 300,000 Customers

Over 10+ years

Customer Reviews

Based on 1603 reviews
Better recovery

I’ve only taken this about 10 days. I have noticed less overall soreness. I’ve been building mileage the past 2 weeks so I’m still sore and tired, but I think I’m recovering better. I have not noticed any improvement in stamina while training yet.

Thank you for sharing your experience with Extreme Endurance! As you continue to build your mileage, we hope that our product will continue to help you recover better. While stamina improvements may take some time to notice, we are confident that you will see results in your training soon. Keep up the great work!

Brandy Y
Great product. New increases in FTP!

I was hesitant at first but gave Extreme Endurance a try. I took it consistantly and started see a shift upwards in FTP in about 3 weeks. It has also helped greatly with recovery. I'm a believer and a happy customer!

Thanks for choosing Extreme Endurance! We're thrilled to hear that you finally gave it a try and are seeing such incredible results in such a short time. We hope you continue to see great improvements with our product. Keep pushing to the extreme!

XC Mountain Biking

great product. I could defiantly feel the difference after a long race.

Thanks for choosing Extreme Endurance! We are so glad to hear that our product has been providing you with positive results. Our goal is to provide our customers with the endurance and energy they need to excel in their chosen sports and we're thrilled to hear that it made a noticeable difference during your long XC mountain biking race. Keep crushing those races!

Micah Dunlevy
5 Way Bypass open heart surgery

50 weeks ago, family genetics caught up to me. Fortunately I caught it before a heart attack or stroke. I had my first surgery of my life a 5 way bypass. I had been training for the last seven years, trail running, mountain biking, road cycling, CrossFit, strength training and SUP. I had tried Xendurance prior and was pleased with. Now 50 weeks post surgery this product is tremendously helping get back my endurance, stamina and strength!

Thank you for sharing your experience with Extreme Endurance. We are so glad to hear that it has been helpful in your recovery journey after undergoing such a major surgery. We are honored to be a part of your fitness journey and are happy to see that our product has helped you get back on track. We wish you continued success in your health and fitness goals. Keep up the amazing work!

Gave me the edge to push for the win

Usually I gas out hard halfway down the track on a downhill mtb race, but I felt like I could just keep pushing at this season opener after about a month taking xendurance, and I felt like that really helped me secure the victory.

Amazing! We're thrilled to hear that Extreme Endurance gave you the boost you needed to secure the victory at your season opener. Our goal is to help athletes like you push through to the finish line with confidence and strength. Keep up the great work and we wish you continued success in your upcoming races!

Great prodcut

Just ran my first marathon , these helped with my recovery and all training leading up to it !

Amazing! We are glad to hear that you have found Extreme Endurance helpful in your fitness journey. Keep up the great work and we wish you continued success in all your future runs!

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


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.com

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