Extreme Endurance

The World’s #1 Endurance Supplement for Stamina, Recovery and Soreness.

Clinically proven to:

  • Reduce Lactic Acid by 26% - Less Muscle Soreness
  • Reduce Oxidative Stress by 39% - Fights Free Radical Damage
  • Reduce Creatine Kinase by 6X - Faster Recovery

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Delivered every 12 months

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Josh Bridges

There’s a noticeable difference in my soreness when I’m not on this product. There's a reason I’ve used this product for eight years!

Danielle Brandon

This is my secret that I don’t like to talk about. It’s my best recovery tool.

Craig Engels

The one product I take daily and recommend to everyone is Extreme Endurance. It’s insanely effective and the clinical research backs it. If you want to improve your running this is by far the easiest thing you can do!

Extreme Endurance vs the Competition

When it’s time to unleash your inner-Hercules and bounce back stronger than ever… Its very hard to beat the results you will feel with Extreme Endurance.


Proven by rigorous scientific research and tested by unbiased 3rd parties.

Proven to reduce lactic acid by 26%

Proven to reduce oxidative stress by 39%

Informed-Sport Certified

Made in the U.S.A & backed by our 100% 30-day money back guarantee.

Customer Reviews

Based on 1530 reviews
Barton C. Williams
A genuine game changer!

I’ve been training for years and used a variety of supplements but “
Xendurance” has really helped my recovery and endurance for the vastly diverse cross training I do from running, gym, boxing, yoga, swimming, paddling and pogo workouts!

Wow! Thank you for sharing your experience with Extreme Endurance. We are thrilled to hear that our product has been a game changer for your diverse training routine. We pride ourselves on creating a supplement that truly enhances recovery and endurance for all types of workouts. Way to go! Keep up the amazing work

Richard Jun
Actually works!!! Leveled up my Crossfit game!

I'm 46 and in my second year of crossfit. Recovery and energy levels are a challenge at my age. I have used Xendurance for the last 6 months and noticed a big difference in my recovery. I also feel like I have an extra 10% to give at every work out! I qualifed for quarterfinals this year during the crossfit open.

Awesome! We are thrilled to hear that it has helped you level up your Crossfit game and improve your recovery and energy levels. We understand that age can be a challenge, but we are happy to know that our product has made a difference for you. Keep up the great work and we wish you continued success in your Crossfit journey. Congratulations on qualifying for quarterfinals this year! Keep pushing and we are here to support you every step of the way.

Ryan Killough
Noticeable Difference

Normally I am very hesitant to try new supplements without doing extensive research. However, with the people who recommended this product I decided to try it. I did the 1 week challenge that they ask you to try when you purchase the product. I tested a 3 mile run and then retested one week later. I was able to shave 50 seconds off of my time and I felt like it could breath better on my retest. Weather that is a placebo effect or an actual difference I'm not sure. One unexpected difference that I noticed is that I am not sore after intense workouts while taking this product. So in conclusion, there is a noticeable difference in lactic acid build-up in the muscles and there seems to be a difference in VO2 Max also. I would recommend it if you are interested. Give it a try and see what differences you notice.

Thank you for taking the time to share your experience with Extreme Endurance. We're thrilled to hear that you noticed a difference in your performance after using our product. Our 1 week challenge is a great way to see the potential benefits and we're happy to hear it worked for you! We hope you continue to see great improvements with our product. Keep crushing those goals!

Marykate Boylan
No more fatigue during workouts!

Love this product so far. I did a test doing a 2 mile assault bike before taking xendurance and then retested after 2 weeks dropping 8 seconds off my time! Can't wait to see how this will help me doing Murph workout!

Wow! We love hearing about the positive results from our products, and we're so glad that Extreme Endurance has helped you during your workouts. It's always exciting to see improvements in performance, and we can't wait to see how it continues to benefit you in the future. Keep up the great work!

Laura Allwes
Just a regular runner

I started taking these about 2 weeks ago. It honestly had my doubts but I have been proved wrong! I’ve always been a distance runner but get horrible lactic acid buildup. This has absolutely been a game changer. I can’t wait to see how I am after taking it for months!!!!!

Hi there,

Thank you for sharing your experience with Extreme Endurance! We're thrilled to hear that it has already made a positive impact on your running performance. We're confident that it will continue to be a game changer for you in the long run. Keep up the great work and happy running!

Laura Magnusson
Just Magic

Honestly. Just buy it. You want to get faster? Buy it. You want to go further and not feel as tired? Buy it. I cheated and timed myself before taking them and less than a week later I shave more than a minute off my pace. i have a half marathon race in a week and I can’t wait to see what time I get. I don’t care if it’s a placebo effect. I will be using these forever.

Wow, that's amazing! We are thrilled to hear about your success with our Extreme Endurance product! We believe in the power of our product and are happy to hear it's making a difference for you. Best of luck on your upcoming race, we can't wait to hear about your results!

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