Ketone Esters 2026 New Evidence: Should You Use Them or Not?

Why Are Ketone Supplements Becoming Popular?

Ketone esters gained widespread attention around 2018 after being spotlighted by Team Sky / INEOS during the Tour de France. The principle is that exogenous ketones (β-hydroxybutyrate) serve as a third energy source, theoretically reducing glycogen depletion and improving late-race endurance performance.

A new wave of research from 2024–2026 using more rigorous double-blind designs has reached more conservative conclusions than earlier studies. This article consolidates the latest evidence.

The 3 Forms of Ketones

Research primarily supports Ketone Esters (e.g., HVMN Ketone-IQ, deltaG); the other forms have limited efficacy.

Key Research from 2024–2026

Study 1: 2024 ASPETAR Double-Blind Controlled Trial

Subjects: 24 professional cyclists, 3-hour time trial.

• Ketone ester group: average power +1.2% (not significant)
• Placebo group: baseline
• Conclusion: Limited efficacy for professional athletes

Study 2: 2025 Belgian Leuven University Long-Distance Study

Subjects: 32 amateur endurance athletes, 6-hour simulated ride.

• Ketone ester group: retained 4.5% more power in the final 2 hours
• Placebo group: power declined 8% in the final 2 hours
• Conclusion: May be effective for events lasting 4+ hours

Study 3: 2026 Australian Catapult Recovery Study

Focused on post-training recovery rather than in-race performance.

• Consuming ketone esters 30 minutes post-training, 24-hour HRV recovery was 12% faster
• Muscle glycogen replenishment rate did not improve
• Conclusion: Recovery applications may be more valuable than performance applications

Should You Use It? A 4-Scenario Decision Guide

Scenario 1: 4+ Hour Long-Distance Events

Consider using it. For events like Wuling, KOM, and Gran Fondo, the late-race ketone benefits are more pronounced.

Recommended dosage: 30 minutes pre-race + 25–30g every 90 minutes during the race.

Scenario 2: Short, High-Intensity Events < 90 Minutes

Not recommended. For short events, glycogen stores are sufficient; ketones may instead cause stomach discomfort.

Scenario 3: Training Recovery

Worth trying. Particularly during consecutive training days (e.g., island tours, training camps), the value of improved recovery speed is greater.

Scenario 4: Weight Loss / Ketogenic Diet Combination

Limited efficacy. Endogenous ketones are sufficient to meet metabolic demands; exogenous supplementation does not enhance performance.

Side Effects and Precautions

1. Strong Taste

Ketone esters taste extremely unpleasant (most describe it as “gasoline-like”), and approximately 30% of users give up after the first try.

Tip: Dilute with sparkling water, drink quickly after chilling, and pair with a lemon slice.

2. Gastrointestinal Discomfort

Approximately 15–20% of users experience nausea or stomach pain. Always test for the first time during training, never on race day.

3. Blood Glucose Response

Ketone esters do not affect blood glucose, but some formulations contain maltodextrin, so watch for rebound hypoglycemia.

4. Drug Interactions

Diabetics and those taking SGLT2 inhibitors should avoid use—it may trigger ketoacidosis.

Usage Protocol (If You Decide to Try It)

Phase 1: Training Testing (4–6 Weeks)

• Week 1: 25g post-training (recovery use)
• Week 2: 25g 30 minutes pre-training (performance use)
• Weeks 3–4: Simulate full race-day fueling protocol
• Weeks 5–6: Fine-tune based on individual response

Never use for the first time on race day.

Phase 2: Race Application

• 30 minutes pre-race: 25–30g + 200ml water
• During race at 90 / 180 / 270 minutes: 20g each
• 30 minutes post-race: 25g + 30g protein + 60g carbohydrates

Pricing and Market

Per-serving cost is approximately NT$300–600, which is 5–10 times that of high-carbohydrate fueling.

Practical Advice for Amateur Athletes

Supplement Investment Priority

1. Carbohydrate fueling (60–90g per hour): Highest cost-performance value
2. Electrolytes / salt tablets: Essential for hot-weather events
3. Caffeine (3–6mg/kg): The legal supplement with the strongest evidence
4. Beetroot juice (70ml 2 hours pre-race): High cost-performance value
5. Ketone esters: Optional for 4+ hour events

Conclusion

Ketone supplements were over-hyped from 2018–2022; evidence from 2024–2026 has become more conservative.

• If you are an advanced rider targeting a 4+ hour PR: Worth trying
• If you are an amateur beginner: Address the 3 fundamentals first—carbohydrates, electrolytes, caffeine
• If you have a limited budget: Spend money on supplements with higher cost-performance value

Ketones are not a magic potion; they are a precision tuning tool for those with a solid training foundation.

Related Reading

• The Truth About Ketone Esters in Cycling
• The Impact of Ketone Esters on Cycling Time Trials: Latest RCT
• The Ketone Supplement Controversy: Why the UCI Does Not Recommend Them, and What the Evidence Actually Says
• Ketone Ester Drinks: Do the Expensive “Fourth Fuel” Actually Work