Say goodbye to frequent muscle fatigue & short-lived energy. Extreme Endurance triggers a powerful boost to stamina & aerobic threshold – helping you hustle through each workout & competitive event with a fierce drive of energy, resilience & longevity. Extreme Endurance is in your system and starts working within 72 hours and you WILL feel the difference.
Fast-track your muscle recovery
Rise like the Phoenix and finally conquer soreness & lactic acid buildup – the main culprit of muscle fatigue from exercise. Thanks to Extreme Endurance’s ability to quickly react against muscle trauma and oxidative stress, your next training session or morning jog will leave you feeling renewed - and ready to go again!
Say goodbye to frequent muscle fatigue & short-lived energy. Extreme Endurance triggers a powerful boost to stamina & aerobic threshold – helping you burst through each workout & sporting event with a brand new, fierce drive of energy, resilience & longevity. Benefits start after just 72 hours, unlike many supplements that need several days or weeks to kick in.
Steps to take Extreme Endurance for Optimal Results
Morning
Take 3 Tablets Of Extreme Endurance with or without food first thing in the morning
Evening
Take 3 Tablets Of Extreme Endurance with or without food before bed
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.
Benefits
Extreme Endurance
Other recovery supplements
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.
Join the Membership
Entire Site Discount
25% off all products, apparel and accessories for a full year.
Free Domestic Shipping
No matter the order size, receive free shipping anywhere in the US and Military APOs
Partner Discounts
More discounts from 40+ partners! PerformaSleep, Nike Training Club, Vitamix to name a few!
Have peace-of-mind knowing Extreme Endurance is fully compliant with all professional, collegiate and olympic organizations in the world. This formula contains zero banned ingredients – it’s an all-natural, electrolyte mineral supplement & it’s certified ISO 17025 tested for banned substances.
✔️ Calcium Carbonate – Strengthens muscle, bone & heart function ✔️ Papain – Anti-inflammatory that reduces muscle soreness after exercise ✔️ Magnesium – Improves muscle function & may boost athletic performance ✔️ Black Pepper Fruit – Powerful antioxidant that enriches nutrient absorption ✔️ Selenium, Chromium & Potassium – Vital minerals for growth & recovery
Proven over decades of clinical testing
Trust is EVERYTHING. Josh Bridges, former 4X Crossfit games athlete and Navy Seal has used Extreme Endurance for 10 years. Danielle Brandon, Donavan Brazier, Clayton Murphy, Amanda Barnhart… to name a few…. have all trusted that this product helps their chances to podium. Backed by 12 unique clinical studies (two of which are published, Gold Standard, double blind & placebo controlled), Extreme Endurance is arguably the most researched & proven sports supplement in the world – and it’s formulated w/ 100% natural ingredients for ANYONE of any fitness level.
Put Extreme Endurance to the Test
Step 1
Time or measure your typical training or activity
Step 2
Take the daily dose of Extreme Endurance for a minimum of 10 days
Step 3
Re-time or measure your typical training or activity and you will see the difference
The Xendurance Promise
Informed Sport
Third-party tested for prohibited substances
Not Satisfied?
Return your product within 30 days no questions asked!
Never Artificial
No artificial dyes, flavors or sweeteners in our products!
Finally – the “easy button” for constant soreness & fatigue
Change your mind? Return it within 30 days for a 100% refund – no questions asked.
FAQ
Extreme Endurance will be in your system and working within 48-72 hours. We can confirm this from 12+ years of clinical testing.
Extreme Endurance can be taken together with almost every other supplement but many times we tell people they should not combine with any more magnesium or calcium. If you are taking any other product with magnesium or calcium, please contact info@xendurance if you are concerned about the amount you are taking.
You do not need to take Extreme Endurance with food.
Extreme Endurance was the very first US sports nutrition supplement certified drug free by LGC; Informed Choice and 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 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 10 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.
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 or after taking their tablets just as a precaution.
You don’t cycle with Extreme Endurance. You take it consistently, like a multivitamin; for training, performance and for better body pH and alkalinity.