Stamox® Oxy-Plus Beetroot Endurance Supplement

Yes — but the gains look different.

The dietary nitrate research shows a clear population effect. Recreational and sub-elite athletes often see larger percentage improvements in time-to-exhaustion and VO₂ max, because their baseline oxygen efficiency has more room to improve. Elite athletes, whose oxygen exchange is already highly optimized, see smaller percentages from nitrate alone.

But Stamox isn't isolated nitrate. It's the full beetroot matrix — nitrate, betaine, betalains, and polyphenols. The other three actives address different limiting factors:

• Betaine supports muscle contractility across repeated efforts
• Betalains and polyphenols reduce oxidative stress and inflammation

These matter more, not less, as training load increases. Elite athletes produce more oxidative stress, need faster recovery between sessions, and often decide races in the final 20% — where cerebral blood flow and pacing matter most.

That's why you'll find Stamox in the bottles of Olympians and World Champions. The nitrate percentage may be smaller. The whole-root matrix still does its job.

Raw beetroot powders contain fibers and oxalates that cause stomach issues during hard efforts. Stamox is a highly refined extract—we isolate the active matrix and remove the fibrous compounds for maximum tolerability. However, as with any sports nutrition, we always recommend testing your dosing protocol in training before using it on race day.

You would have to drink a lot of "regular" beetroot juice to achieve a good effect, and the amount you need to drink will vary enormously.

There are many types of beetroot juice available for purchase. But the "strength" of these is not further described, defined and tested. You can use beetroot or beetroot juice, but the effect will be unpredictable and usually less effective, or have zero effect. Plus, our extraction preserves the full beetroot matrix—we don't strip out the betaine and betalains like generic powders do.

Generic beetroot is unpredictable, and you can't build a serious training program on guesswork. Stamox provides consistent, measurable results trusted by elite athletes for 19 years.

Yes. Stamox undergoes rigorous testing by the Anti-Doping Laboratory in Cambridge.

They confirm it is 100% free from prohibited substances and natural contaminants. We regularly submit batch samples and can provide certification documents upon request.

Two tablespoons of Stamox deliver approximately 300 mg of natural dietary nitrate (our extract averages a highly consistent 1.5% nitrate content).

Taking isolated, synthetic nitrates won't give you the same performance boost. The real power of Stamox is the synergy. You are getting that precise nitrate dose working together with the plant's natural antioxidants, betalains, and betaine. That full-spectrum matrix is what actually drives the lower heart rate and faster recovery.

Premium red beetroot extract (Beta vulgaris) with a maltodextrin carrier.