Beetroot Powder vs Ketone Ester for Oxygen Efficiency: Two Different Bets

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 (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: 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 Evidence (Strong)

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

• 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 1-3% reduction in oxygen cost
• Larsen et al. (2011): Mitochondrial efficiency improvement via nitric oxide
• Studies 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)

• Cox et al. (2016): 2% improvement in elite cyclists, but this is 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

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. 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.

When Ketone Esters Make Sense

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, 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

Factor	Beetroot Powder (Dietary Nitrate)	Ketone Ester (HVMN)
Mechanism	Nitrate to nitric oxide, vasodilation + mitochondrial efficiency	Alternate fuel substrate, glycogen sparing
Evidence base	Strong, well-replicated in multiple labs	Mixed, flagship study not consistently replicated
Cost per dose	Under $2	$30-$40
GI tolerance	Good (especially fiber-removed formulas)	Significant GI distress at race dose for many athletes
Peak effect timing	60-90 min post-ingestion	30-60 min post-ingestion
Best use case	Any endurance event at submaximal intensity	Ultra-distance where glycogen is a limiter
Loading required	3-5 days pre-event for best results	Single acute dose; no loading benefit
Daily training use	Yes, beneficial for baseline NO levels	Not practical at $30-40/dose

For Masters Athletes

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.

Frequently Asked Questions

Are ketone esters and beetroot powder the same thing? No. They work through completely different mechanisms. Beetroot powder (dietary nitrate) improves oxygen delivery and mitochondrial efficiency via the nitrate-to-nitric-oxide pathway. Ketone esters provide an alternative fuel substrate (beta-hydroxybutyrate) that may reduce reliance on glycogen. They address different performance limiters.

Is HVMN Ketone worth it for endurance athletes? The evidence is mixed. The landmark 2016 study by Cox et al. showed a 2% improvement in elite cyclists, but multiple subsequent studies in trained and sub-elite athletes have not consistently replicated the effect. At $30-40 per dose, the cost-per-benefit calculation is difficult to justify for most athletes compared to dietary nitrate at under $2 per dose.

Can you take beetroot powder and ketone esters together? Yes. They work through different pathways and do not interfere with each other. For ultra-distance events where glycogen sparing is a real limiter, combining both is theoretically defensible. For events under 5 hours, dietary nitrate alone addresses the primary oxygen efficiency opportunity at far lower cost.

What is the best beet supplement for oxygen efficiency? The most important factor is standardized nitrate content. Look for a product that specifies dietary nitrate mg per serving rather than listing beet concentrate without a nitrate guarantee. Beetroot Pro uses patented betaine nitrate (NO3-T) which delivers 300mg+ dietary nitrate per serving with batch-to-batch consistency.

Does beetroot powder improve VO2 max? Dietary nitrate does not raise your aerobic ceiling (VO2 max). What it does is reduce the oxygen cost of exercising at a given pace or wattage, which means you use a smaller fraction of your VO2 max at race pace. The practical effect is similar to a VO2 max improvement: you can go faster or further at the same perceived effort.