Regular price £39.95

Certified By Informed Sport.

The Benefits:

  • Reduce muscle soreness, improve stamina plus accelerate your recovery.
  • 30 day money back guarantee if you are not completely satisfied
  • Can help with the reduction of oxidative stress
  • Can help with the reduction of creatine kinase
  • Can help increase your aerobic threshold
  • Fight off fatigue, last longer and go harder

World class athletes have trusted our Lactic Acid Buffer since 2008 for performance benefits. But do not trust us, just read the reviews:

"I'm a bit of a sceptic with these 'performance enhancing' supplements but I can say hands down these are fantastic...started a bout of low cadence, high resistance training which normally accrues fatigue quickly for long periods but I've found since taking these a noticeable difference both during the rides (holding resistance longer) and recovery and the ability to push on (be mindful of overtraining!). I'll definitely keep taking them through to late autumn/early winter." From

"I've been using these for a few months now and really noticed the difference they make when I ran out of tablets last week and had to do a sportive and training without them for about a week. I used to always suffer with cramp - to the point that I would be in tears with pain at night, but nothing since I started using these. They really work and I will make sure not to run out again :-)" From


Calcium carbonate, Magnesium hydroxide, Papain (Carica papaya L)(Fruit extract), Stabliser (Potassium chloride). Magnesium oxide, Green tea (Camellia sinensis (L) (Kuntze) (Leaf extract, Bioperine (Piper nigram L)(Fruit extract), Anticaking agents: (Magnesium salts of fatty acids), Selenium (L-Selenomethionine), Chromium (Chromium picolinate).

This product does not contain any gluten, wheat, milk, soy, yeast, sodium, artificial flavours, sweeteners, colourings and preservatives.


Food supplements should not be used as a substitute for a varied balance diet and healthy lifestyle. Store in a cool, dry place. Keep out of reach of young children. Do not use if safety seal is broken or missing. Do not exceed recommended daily dose.

Nutritional Information
Servings per container: 180
Recommended Dosage: See *Recommended Dosage

average rating 5.0 out of 5
Based on 1 review
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100% of reviewers would recommend this product to a friend
1 Review
Reviewed by Dan, from United Kingdom
Verified Reviewer
I recommend this product
Age Range
25 - 34
Primary Sport
Rated 5 out of 5
Review posted

Genuinely helps with sore legs!!

I've been taking this for about 3 weeks now and I'm seeing a marked improvement in my swim sessions and less soreness the morning after training in the gym

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Have you ever had a burning sensation in your muscles during intense exercise? This is a signal that your body is being deprived of oxygen - and lactic acid is being created. When your body produces lactic acid, it splits into two ions; lactate ions (lactate) and hydrogen ions (H+) . H+ is the acid in lactic acid. Intramuscular Acidosis – The pH (acid) is not due to lactate but rather the production of H+ which is part of the process of energy released from the breakdown of glucose. As H+ are released, intramuscular pH goes acid leading to fatigue and creates the burning feeling in your muscles during intense exercise.


What exactly is this elusive VO2 Max, why is it important to know, how is it measured, and how can you improve your VO2 Max? VO2 Max is the maximum amount of oxygen you can consume that goes to the working muscles. In short, we need oxygen to survive and perform daily living activities, not just during exercise. If we want to use oxygen more efficiently by increasing VO2 Max, activities such as nutrition, movement, and breathing all need to be taken into consideration for improvement. We all want to breath better and stronger!


The same process that causes a car to rust, plays a similar corrosive role in our bodies. It is called oxidation. Oxidative stress is essentially an imbalance between free radical production vs antioxidants. Antioxidants constantly fight to neutralize free radicals, thereby improving cell function. Oxidative stress can damage cells and contribute to the aging process. Oxidative stress may also play a role in several diseases such as cancer, Alzheimers, and diabetes. The goal should be to flood your body with powerful antioxidants and ward off the effects of free radical damage in the body.


Health is a daily consideration. Or should be! Whether you are looking for performance, anti-aging or recovery, Xendurance should be taken daily. This proprietary combination of ingredients should be consistently released into your system twice a day for ongoing support. It starts working 48-72 hours after you take it and the science shows the longer you take Xendurance, the greater the benefits. Take it daily!


Xendurance Lactic Acid Buffer was one of the very first 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 organisations, 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 Xendurance 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 Xendurance Lactic Acid Buffer. You take it consistently, like a multivitamin; for training, performance and for better body pH and alkalinity. 3

Xendurance will be in your system and working within 48-72 hours. We can confirm this from 12+ years of clinical testing.

Xendurance 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 Xendurance Lactic Acid Buffer with food - we recommend taking them with a big glass of water.