Extreme Endurance

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

Clinically proven to:

  • Reduce lactic acid by 26%.
  • Reduce oxidative stress by 39%.
  • Reduce Creatine Kinase by 6X.

No available purchase options for this selection.
Delivered every 12 months

Money Back Guarantee

Same Day Shipping

Become a Member & Save 25% OFF

Purchase a Team XND Membership and receive:

  • 25% Off Sitewide
  • $100 Worth of Product Rewards
  • Free US Shipping.
  • No Order Minimums. Exclusive Partner Perks

Proven by Clinical Studies

Trusted by 100,000 Athletes

Trust is EVERYTHING... That's why Extreme Endurance is used by world-class performers like Josh Bridges to help their chances to get on top of the podium.

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.

Getting the most out of Extreme Endurance

Frequently Asked Questions

Customer Reviews

Based on 829 reviews
Brandon Chance
got my breath back

I am currently training for my 7th Ironman which is coming up in November. Prior to taking this and post "covid" time I was having issues with catching my breath. Whichever discipline I was training in I was finding myself gasping for air, just looking to maintain a steady breathing pattern which I had never had a problem with before.
Since starting Xendurance I havent had issues with catching my breath, my runs have improved to where they should be, I feel great on the bike, and my breathing during swimming is consistent. I also have been feeling better and recovering faster during my weight training sessions. Def worth the purchase.

It Works!

I am a newer CrossFit member but sometimes bike and run. I started Extreme Endurance 3 weeks leading up to a sprint triathlon. With little training I somehow pulled off 1st AG and 20th female overall. I’m a believer!

Hi Joyce,

Great job! Congratulations on your success!

Fastest 5k I've run in years!

Ran almost 2 minutes faster this year on the same course I ran a year ago. Thanks!

Hi Jeff,

Thanks for the review! We're glad you're enjoying the product.

B. Breshears
XEndurance Extreme Endurance

Completed the challenge. Improved my Grace time by 10 seconds. Have been able to increase my training capacity to 3 double days a week.

Hi B,

Thanks for taking the time to write a review for XEndurance Extreme Endurance! We're glad to hear that you're enjoying the product and that it's helping you improve your fitness. Keep up the good work!

Rick Mason
So far so good

Been taking Xendurance for a week and have noticed that I can eke out a couple extra reps on most all sets. I plan to keep taking it to see if gains continue.

Hi Rick,

Thanks for the feedback! We're happy to hear that Xendurance is helping you improve your workout performance. Keep up the good work!

Feel great!

Started taking almost 2 weeks ago and already feel better during and especially after training. Definitely recommend for BJJ athletes.

Extreme Endurance is in your system within 72 hours. We thank you very much for your positive review and photo!

Join Team XND & Save

  • $100 in Immediate Rewards.
  • Free Shipping + 25% OFF On Every Order.
  • 2x Loyalty Points.
  • Partner Perks + More.
Learn More