Optimise VO₂ Max. Sustain Power. Recover Faster.

Stamox Oxy-Plus — Beetroot Endurance Extract

4.9 4,000+ Reviews

Lower the oxygen cost of intense training. A precise beetroot extract — without the variability of regular juice.

  • 3–5% Lower O₂ Cost: The same effort feels easier.
  • +16% Time to Exhaustion: Maintain power deep into hard efforts.
  • Faster Recovery: Fresher legs for the next session. No GI distress.
  • Peak Effect in 2–3 Hours: Predictable performance, no stimulants.

IOC Consensus: One of only five supplements with strong performance evidence.

19 Years
R&D
Anti-Doping
Tested
Formulated
In Norway
Free shipping over €175 · No customs within EU, UK & Norway.

VO₂ max from 54 to 60 in 3 months. Resting heart rate: 37 bpm.

Kev Jackson · Hyrox Pro Athlete

Heart rate 5–6 bpm lower at the same intensity.

Maicol Petta · Ironman Italy AG Champ

8 Beats Lower. Same Watts.

Athletes on a podium with medals, promoting stamox beetroot sport nutrition for vo2 max.

"380 watts at 145 bpm with Stamox. Without: 153 bpm. That's 8 beats lower at the same power." 

—Arvid Johannesen, Norwegian & Nordic Champion Cyclist

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How It Works

Stamox optimises how your body uses oxygen at the cellular level. Effects peak 2–3 hours after consuming.
Blurred action shot of an athlete for beetroot sport nutrition to boost vo2 max
THE SCIENCE

One of the most studied
ingredients in sport.

"Dietary nitrate reduces the O₂ cost of exercise and extends time-to-exhaustion by up to 16%." Prof. Andrew Jones, University of Exeter (Bailey et al., 2009)

Why the whole root matters

Fresh organic beetroots for stamox beetroot sport nutrition to improve vo2 max

Stamox vs Regular Beetroot Juice

Stamox Regular beetroot juice
All key nutrients in one scoop Varies by batch
Measurable results Hard to quantify
Developed in Norway · 19 years R&D Unknown origin
Anti-doping tested Unknown purity
Gentle on the stomach May cause GI distress
Portrait of a man with glasses, representing research for stamox beetroot sport nutrition VO2 max.

Dr. Nils Reither

DVM (Utrecht, 1990)

Nineteen years. One formula.

Stamox was founded in Norway in 2007 by veterinarian Dr. Nils Reither.

Nineteen years of research into blood flow and oxygen efficiency — and ongoing studies with the University of Applied Sciences Upper Austria.

Read Our Story →

How to Use

05 / Critical Constraint

Skip mouthwash, tongue scraping, and breath mints after taking Stamox — they reduce nitrate conversion.

FAQ

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.

Slightly earthy, naturally sweet. Mix with cold water and lemon. No GI distress.

Mix 1 tablespoon into 500ml water, juice, or your pre-workout. For the smoothest mix: liquid first, then powder, wait 2 minutes, stir (or use a frother). Add a splash of lemon or orange to brighten the taste and boost absorption. Also great in smoothies or yoghurt.

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Free across Europe over €175. No customs within EU, UK & Norway.*

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12-Week Results Guarantee

Measurable results or your money back.

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Personal Protocol Support

Race or dosage questions? Email us.

info@stamox.com