Beetroot Nitrate

What it is

Beetroot is a concentrated food source of inorganic nitrate. After absorption, some nitrate is concentrated into saliva, where oral bacteria reduce it to nitrite. Swallowed nitrite can then be reduced to nitric oxide, especially in lower-oxygen and more acidic tissue. The relevant promise is not that beetroot makes blood carry more oxygen. It is that nitrate-derived nitric oxide may change vascular tone, exercise economy, muscle blood-flow distribution, and contractile function.

Not natural tadalafil

This experiment followed my stopped tadalafil experiment, but the two interventions are not natural and pharmaceutical versions of the same thing. Dietary nitrate sits upstream and supplies material for nitric-oxide production. Tadalafil and other PDE5 inhibitors sit downstream and slow the breakdown of cGMP after nitric oxide has already triggered the signal. The connection was the practical goal, training blood flow and pump, not pharmacological equivalence.

The dose was legitimate

One 400 mg shot provides about 6.45 mmol of nitrate. That is not a token beet dose: sports guidance commonly places the useful acute range around 6-8 mmol, or roughly 350-500 mg, generally consumed two to three hours before exercise. Independent testing of commercial beet products measured tested lots of the Pro-Elite shot at 6.41 plus or minus 0.60 mmol per serving, close to the label claim. That does not assay my exact lot, but it makes gross underdosing a weaker explanation than it would be with an unstandardized beet powder.

What the performance evidence supports

A 2025 umbrella review re-analyzed 180 primary studies involving 2,672 unique participants. The positive signals were task-specific: time to exhaustion, total distance, muscular endurance, peak power, and time to peak power. The same analysis found no average benefit for self-paced time trials, maximal strength, VO2max, graded exercise tests, total work, or mean power. Benefits in time-to-exhaustion tests were more apparent at a minimum of 6 mmol per day and after more than three days, but most of the underlying reviews were rated low or critically low quality. The honest summary is a small, inconsistent edge in selected tests, not a general performance boost a person should expect to feel.

Strength versus muscular endurance

Resistance-exercise studies illustrate the difference. A small meta-analysis in resistance-trained men found improvements in repetitions to failure, mean power, and mean velocity, but not peak power or peak velocity. The broader umbrella analysis found muscular endurance improved while maximal strength did not. A newer dose-response crossover study then tested approximately 6, 12, and 24 mmol in trained men: blood nitrate and nitrite rose, but squat, bench press, jump, power, and velocity performance did not improve at any dose. This makes a one-day deadlift PR a poor nitrate readout. It is a good training result, not evidence of causation.

Pump and visible vascularity

Subjective pump and visible veins are not established nitrate outcomes in the research. Trials usually measure arterial diameter, blood flow, vascular conductance, muscle oxygenation, or exercise performance instead. In one placebo-controlled trial, 800 mg of nitrate raised plasma nitrate 19.5-fold and nitrite 1.6-fold and lowered arterial stiffness, yet did not change brachial-artery diameter or forearm blood flow at rest or during graded handgrip exercise. Other small studies using higher doses have found increased exercising-muscle flow. The mixed result is the point: biological exposure and vasodilation do not guarantee a visible or felt bodybuilding pump.

Blood pressure can move without a felt effect

One especially relevant crossover study used the same 400 mg nitrate dose for 15 consecutive days in 14 healthy men. Plasma nitrate and nitrite increased, while resting and exercising blood pressure and vascular resistance fell compared with nitrate-depleted beetroot juice. That shows how the pathway can produce quiet physiological changes without a stimulant-like sensation. It does not mean everyone will show the same response. My daily home readings did not show a blood-pressure change I could distinguish from baseline.

Why responses vary

Conversion depends partly on nitrate-reducing oral bacteria. Controlled studies show that antibacterial mouthwash can suppress the expected rise in plasma nitrite. Baseline diet, oral-microbiome composition, training status, exercise type, dose timing, and the size of the effect relative to normal day-to-day training noise can all influence whether a response is detectable. These are plausible modifiers, not rescue explanations I can prove after the fact.

Safety boundary

Concentrated beetroot juice can cause gastrointestinal discomfort and harmless pink or red urine and stool, and nitrate can lower blood pressure in some people. Dietary inorganic nitrate is also not the same exposure as prescription organic nitrate drugs. This page does not establish the safety of combining a concentrated nitrate supplement with PDE5 inhibitors or other blood-pressure agents. It documents one completed personal experiment, not a protocol or combination recommendation.

Sources

• Australian Institute of Sport: dietary nitrate / beetroot juice — nitrate metabolism, typical 6-8 mmol dose, timing, performance context, and safety considerations.
• Gallardo and Coggan, Int J Sport Nutr Exerc Metab 2019 — independent nitrate-content testing of commercial beetroot products, including the Pro-Elite shot.
• Poon et al., Sports Medicine 2025 — umbrella review and primary-study re-analysis across exercise performance outcomes.
• Tan et al., Nutrients 2023 — meta-analysis of back-squat and bench-press repetitions, power, and velocity.
• Tan et al., Eur J Appl Physiol 2025 — resistance-exercise dose-response trial at approximately 6, 12, and 24 mmol.
• Kim et al., Appl Physiol Nutr Metab 2015 — nitrate and nitrite rose without greater brachial diameter or exercising forearm blood flow.
• Lee et al., Am J Physiol 2015 — 400 mg daily for 15 days, plasma nitrate/nitrite, blood pressure, vascular resistance, and endothelial function.
• McDonagh et al., Nitric Oxide 2015 — antibacterial mouthwash and suppression of the plasma-nitrite response during beetroot supplementation.

Why I tried it

After tadalafil failed on muscle pain and sleep disruption, I wanted to test a dietary route into nitric-oxide biology. The target was narrow: more visible vascularity and a stronger pump during training, without the long pharmacological exposure that made tadalafil unacceptable for me.

Protocol

Fifteen BEET IT Sport Pro-Elite shots across 15 training days. Each 70 mL bottle listed 400 mg of dietary beet nitrate, about 6.45 mmol. I finished the package rather than stopping after the first few null sessions because I wanted to give a small and potentially subtle effect repeated opportunities to appear.

What counted as a signal

The primary signal was repeatable improvement in training blood flow: stronger pump, more visible vascularity, or a consistent difference in how working muscles felt. Strength, cardio, perceived recovery, and daily home blood-pressure readings were secondary watch signals. I was not looking for a stimulant sensation or treating beet-colored urine as evidence of performance.

The existing-stack problem

This was a real-stack experiment, not an isolated supplement trial. My normal pre-workout already included a citrulline-based pump formula, and during the broader period I later recorded Mirodenafil as a successful training blood-flow experiment. That makes the practical question more specific: did adding the beetroot shot create a distinguishable incremental benefit on top of what I was already doing? I could not detect one.

Day two: the deadlift PR

On the second beetroot day I set a new deadlift PR. It was worth recording and not worth claiming. One PR can come from training progression, readiness, technique, motivation, or ordinary daily variation. The next 13 exposures did not produce a repeatable strength or training-quality pattern, and the research does not show a dependable maximal-strength effect. I therefore treat the PR as coincident with the experiment, not evidence that the shot caused it.

Result

No signal. I did not see or feel more vascularity, did not get a stronger pump, and did not detect an improvement in strength training, cardio, perceived recovery, or general training quality. By the end I was taking the shots to complete the package and preserve the test, not because they had earned continued use.

Daily blood pressure

I measure blood pressure every day and saw no change I could distinguish from my normal pattern. That is a more objective null than simply saying I felt nothing, but it is still an uncontrolled home series: no blinded placebo phase, pre-specified averaging window, or isolation from training and the rest of the stack. It supports the practical no-signal decision without proving that nitrate was not absorbed or converted.

What this can and cannot conclude

Fifteen unblinded training-day exposures cannot rule out a small effect hidden beneath normal session-to-session variation. They also cannot establish whether plasma nitrate, nitrite, or nitric oxide changed because I did not measure those biomarkers. They do answer the narrower question I bought the product to answer: it produced no practical pump, vascularity, performance, perceived recovery, or blood-pressure benefit I could detect in my normal routine.

Decision

Closed as no signal and not kept in the stack. The dose was credible and the mechanism remains real, but neither makes an undetectable effect useful. I am not doubling the dose or redesigning the experiment to rescue it. For this use case, the beetroot shots did not earn the cost or the ritual.