SUPPLI-X Organic Beetroot Capsules bottle

Beetroot for Endurance: The Nitric Oxide Connection

Why beetroot became elite-athlete fuel

In 2009, a small study at Exeter University showed that drinking 500 ml of beetroot juice raised endurance by up to 16%. Fifteen years later, beetroot is standard kit for cyclists, runners and rowers worldwide.

The science: nitrate to nitric oxide

Beetroot is rich in dietary nitrate (NO3-). Bacteria in your mouth reduce it to nitrite (NO2-). Stomach acid converts that to nitric oxide (NO), a vasodilator that:

  • Widens blood vessels (supports healthy blood flow)
  • Improves oxygen delivery to muscles
  • Reduces the oxygen cost of exercise

The right dose

Effective range: 300-600 mg of nitrate consumed 90-150 minutes before performance. Capsules and powders are a convenient alternative to 500 ml of juice; nitrate content varies by product, so check the label.

Mistakes that kill the effect

  1. Antibacterial mouthwash destroys the oral bacteria you need – avoid for 24h before
  2. Taking it 15 min before – peak nitric oxide is at 2-3 hours
  3. Combining with proton pump inhibitors – stomach acid is part of the conversion

Beyond athletes

Dietary nitrate from beetroot is also being studied for its role in healthy blood flow, including blood flow to the brain in older adults.

Side effects

Pink urine and stool. Harmless. Some people get GI discomfort with high doses – split the dose or take with a small meal.

Beetroot powder vs. beet juice

Most of the original research used concentrated beet juice "shots". Juice works, but it is expensive, has a short shelf life and contains natural sugar. Capsules with organic beetroot powder are a practical daily alternative: no taste, no prep, easy to take when you travel.

The trade-off: whole beetroot powder contains less nitrate per gram than concentrated juice. That is fine for a daily routine, but know what you are buying.

How to time it

  • Daily: take your serving at the same time every day as part of your routine.
  • On training days: many athletes take beetroot about 2 to 3 hours before a workout or race, because nitrate needs time to be converted.*
  • With water: SUPPLI-X recommends two capsules once a day, 20 to 30 minutes before a meal with a glass of water.

Boost the effect with food

Beetroot is not the only nitrate-rich food. You can support the same pathway with:

  • Arugula (rocket), one of the richest nitrate sources
  • Spinach and Swiss chard
  • Celery and lettuce

What to look for on the label

  1. Certified organic beetroot (Beta vulgaris).
  2. Amount per serving in milligrams. SUPPLI-X provides 1,300 mg organic beetroot powder per two-capsule serving.
  3. Identity testing (for example HPLC) and third-party lab testing.
  4. No artificial colors or flavors, plant-based capsule.

FAQ

Why is my urine pink?
That is called beeturia. It comes from the natural red pigment in beets and is harmless.

Can I stack beetroot with creatine?
Yes. They work through different pathways, and many athletes take both.

Is it only for endurance athletes?
No. Lifters, team-sport players and anyone who trains regularly use it as part of their routine.

What we recommend

Our SUPPLI-X Organic Beetroot Capsules deliver 1300mg of certified organic beetroot powder per 2-capsule serving, a natural source of dietary nitrates, with no juice mess. Take as directed on the label.

Bottom line

Beetroot is one of the few supplements with well-established performance gains in clinical trials. It is affordable, natural and well studied.

Shop the products: SUPPLI-X L-Citrulline & L-Arginine

Related reading

*These statements have not been evaluated by the Food and Drug Administration. SUPPLI-X products are not intended to diagnose, treat, cure, or prevent any disease. This article is for general information only and is not medical advice. Talk to your healthcare provider before starting any supplement, especially if you are pregnant, nursing, or take medication.

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