Beetroot Powder vs Ketone Ester for Oxygen Efficiency

Both beetroot powder and ketone esters like HVMN Ketone have been positioned as oxygen efficiency supplements for endurance athletes. Both have published research. Both target performance improvements measured in seconds per kilometer or watts sustained.

The mechanisms could not be more different.

Understanding those mechanisms is how you decide which one belongs in your race-day stack, which one belongs in your daily training, and whether either of them is worth the cost.

The Claims Side by Side

Beetroot powder and ketone esters both target oxygen efficiency but through opposite mechanisms: dietary nitrate cuts the oxygen cost of a given pace by 1 to 2 percent via vasodilation, while ketone esters supply an alternate fuel substrate that some elite-athlete data links to a similar 2 percent gain. The evidence quality and the price per dose are not comparable, which is the real decision point for most athletes.

Beetroot powder (dietary nitrate): Reduces the oxygen cost of submaximal exercise by 1 to 2%. The body uses less oxygen to produce the same power output. This translates to holding race pace with less respiratory demand, or holding a higher pace with the same demand.

Ketone esters (exogenous ketones like HVMN Ketone): The primary claim is that ketones provide an alternative fuel substrate to glucose, potentially allowing the muscle to produce ATP more efficiently per oxygen molecule consumed. Secondary claims include glycogen sparing.

Both are making fundamentally an oxygen efficiency argument. They just take completely different routes to get there.

The Mechanisms

Dietary nitrate converts to nitric oxide through the oral-gastric-circulatory pathway, widening blood vessels and, per newer research, improving mitochondrial efficiency directly. Ketone esters instead supply beta-hydroxybutyrate as an alternate fuel to glucose, with a theoretical (and inconsistently proven) edge in ATP produced per oxygen molecule consumed. One mechanism is delivery-side, the other is fuel-side.

Dietary Nitrate: Vasodilation and Mitochondrial Efficiency

Dietary nitrate converts to nitric oxide through the oral-gastric-circulatory pathway. Nitric oxide dilates blood vessels, increasing blood flow and oxygen delivery to working muscles. Additionally, recent research suggests nitric oxide may improve mitochondrial efficiency directly, reducing the oxygen cost of ATP production at the cellular level (Larsen et al. 2011, Nature Communications).

The effect peaks 2 to 3 hours after ingestion and is measurable at submaximal workloads. The performance benefit is well replicated across cycling, running, and rowing studies at moderate-to-high training loads.

Ketone Esters: Alternate Fuel Substrate

Ketone bodies (beta-hydroxybutyrate) are produced from fat and can be used by the heart and skeletal muscle as fuel. The theoretical advantage: when muscles burn ketones instead of glucose, they may produce slightly more ATP per oxygen molecule, improving the so-called P:O ratio (phosphate produced per oxygen consumed).

The practical reality is more complicated. Ketone ester research has produced mixed results in trained athletes. Some studies show modest performance improvements; others show no effect or impairment. Digestion of ketone esters at high doses causes significant GI distress for many athletes.

HVMN's own published trial (Cox et al. 2016, Cell Metabolism) showed a 2% improvement in cycling efficiency in elite cyclists. However, several replication attempts with recreational and sub-elite athletes have not reliably reproduced the effect.

What the Evidence Actually Shows

Dietary nitrate has 17 studies replicated across multiple independent labs showing a consistent 1 to 3 percent reduction in oxygen cost, per the Cermak et al. (2012) meta-analysis. Ketone ester evidence rests almost entirely on a single 2016 study in elite cyclists that later trials in trained and sub-elite athletes have not consistently reproduced. That gap in replication is the core reason the two supplements are not equivalent bets. For more on how dietary nitrate performs across endurance sports, see nitric oxide from beetroot powder and athletic performance.

Dietary Nitrate Evidence (Strong)

The nitrate-to-nitric-oxide literature is extensive and well-replicated:

Study	Finding
Lansley et al. (2011)	11-second improvement in 4 km cycling time trial after nitrate loading
Cermak et al. (2012)	Meta-analysis of 17 studies, consistent 1 to 3% reduction in oxygen cost
Larsen et al. (2011)	Mitochondrial efficiency improvement via nitric oxide

Studies were conducted in trained cyclists, runners, and rowers across multiple labs. The effect is most pronounced at submaximal workloads, which describes the majority of endurance racing below VO2 max.

Ketone Ester Evidence (Mixed)

Study	Finding
Cox et al. (2016)	2% improvement in elite cyclists; the landmark study used in most commercial claims
Evans et al. (2019)	No performance benefit in trained cyclists
Leckey et al. (2017)	Impaired performance in some conditions
O'Malley et al. (2017)	No improvement in power output
Doidge et al. (2021)	No improvement in 20 km cycling TT

The literature is not settled. The original Cox finding has not been consistently replicated at the training levels most amateur and age-group athletes represent.

Cost: A Real Consideration

A single ketone ester dose runs $30 to $40, putting a race-week loading protocol at $150 to $200 for one event. Beetroot Pro delivers a standardized 1,400mg NO3-T® betaine nitrate dose with 0g added sugar at roughly $1.60 per serving, so a 5-day loading protocol costs under $15 total. The cost-per-evidence-unit gap between the two categories is not close.

HVMN Ketone costs roughly $30 to $40 per single serving at race dose. A race-week loading protocol with daily ketone dosing runs $150 to $200 for a single event. This is not a sustainable daily supplement.

Beetroot Pro is approximately $1.60 per serving at the 28-serving canister price, standardized to 1,400mg NO3-T® betaine nitrate with 0g added sugar per serving, so dosing is consistent batch to batch rather than a vague "beet concentrate" listing. A 5-day loading protocol with two servings on the heavy loading days costs under $15 total. Daily baseline dosing through a training block is under $50 per month.

If you are going to invest in oxygen efficiency supplementation, the cost-per-evidence-unit calculation strongly favors dietary nitrate. The Beetroot Pro nitrate powder is built around that standardized dose specifically so athletes are not guessing at nitrate content the way many beet-juice and unstandardized-powder products require.

When Ketone Esters Make Sense

Ketone esters are defensible only for events over 8 hours, such as full-distance triathlon or ultramarathons, where glycogen depletion is a genuine performance limiter. For events under 5 hours, glycogen is managed adequately by carbohydrate intake, so the oxygen-delivery and lactate-threshold benefits of dietary nitrate are the higher-value intervention. A structured carb fueling plan covers the glycogen-management side of that equation for shorter events.

There is a use case where exogenous ketones are defensible: ultra-long events (8+ hours) where glycogen depletion is a genuine limiter and fat oxidation capacity is a real performance factor. At Ironman or ultramarathon distances, sparing glycogen through ketone-assisted metabolism has theoretical merit even if the performance data is not clean.

For events under 5 hours, the primary limiter is not glycogen availability (managed by carbohydrate intake) but oxygen delivery and lactate threshold. That is where dietary nitrate has the stronger evidence base.

Stacking: Can You Use Both?

Yes. Dietary nitrate and ketone esters work through separate pathways (blood flow versus fuel substrate) and do not interfere with each other. Stacking only makes financial sense for ultra-distance events where glycogen sparing is a real limiter; for events under 5 hours, dietary nitrate alone covers the primary oxygen efficiency opportunity at a fraction of the cost.

Yes, and the mechanisms do not overlap or interfere. If you are racing an ultra-distance event and want to use ketone esters for glycogen sparing plus dietary nitrate for oxygen efficiency, they work through different pathways. There is no contraindication.

For most age-group athletes, the cost-benefit of ketone esters does not justify the price. The 1-2% oxygen efficiency gain from dietary nitrate at under $2 per dose is the higher-ROI intervention.

Comparison Summary

Beetroot powder wins on cost (under $2 versus $30 to $40 per dose), evidence strength (well-replicated versus a single flagship study), and GI tolerance, while ketone esters have a narrower but real edge for ultra-distance glycogen sparing. The table below lines up mechanism, cost, and evidence side by side.

For Masters Athletes

Masters athletes (35+) experience measurable eNOS decline, meaning the body's own enzymatic route to nitric oxide production weakens with age. Dietary nitrate from beetroot powder bypasses that impaired pathway entirely, while ketone esters offer no equivalent compensatory mechanism for age-related vascular changes. See beetroot powder health benefits for the broader vascular and blood pressure research behind this pathway.

Masters athletes (35+) face eNOS decline that makes the nitrate pathway specifically valuable: the enzymatic route to nitric oxide is impaired, and dietary nitrate bypasses that impairment. Ketone esters have no equivalent compensatory mechanism for age-related vascular changes.

If you are a masters athlete choosing where to invest your supplement budget, dietary nitrate has both the stronger evidence base and the more targeted relevance to the specific physiology of aging endurance athletes.