Ketone Drinks for Athletes: Do They Improve Performance?

Current research on Ketone drinks for athletes does not show consistent improvements in athletic performance. They can increase blood levels of beta-hydroxybutyrate (BHB), but studies on endurance, power output, and exercise performance have produced mixed results. Some research reports benefits under specific conditions, while other studies find no benefit or even reduced performance.

For athletes considering Ketone drinks for sports performance, the current evidence supports treating them as an emerging sports nutrition strategy rather than a proven performance enhancer.

Key Takeaways:

• Ketone drinks for athletes can raise blood BHB levels, but higher Ketone levels do not necessarily mean better athletic performance.

• Research on exogenous Ketones and athletic performance is mixed, with positive, neutral, and negative findings.

• Endurance sports are a major focus of Ketone research, but Ketone drinks have not been shown to consistently improve endurance performance.

• Some studies have reported gastrointestinal discomfort after consuming Ketone supplements.

• Research into Ketone drinks and recovery is ongoing, but there is not enough evidence to call them a proven recovery strategy.

• Ketone drinks should not replace established sports nutrition practices such as appropriate carbohydrate intake and hydration.

Do Ketone Drinks Improve Athletic Performance?

No consistent performance benefit has been established for Ketone drinks. Although exogenous Ketones can increase circulating BHB, research has not demonstrated a reliable improvement in endurance, exercise capacity, power output, or time-trial performance.

A systematic review of randomized controlled trials found mixed results across physical-performance outcomes, with positive, neutral, and negative findings across the studies reviewed. The researchers concluded that the evidence was insufficient to establish a clear performance-enhancing effect.

A separate review of Ketone supplementation in sports reached a similar conclusion: Ketone supplementation can change blood Ketone availability, but those metabolic changes do not consistently translate into improved athletic performance.

Why Are Athletes Interested in Ketone Drinks?

Athletes are interested in Ketone drinks because exogenous Ketones provide an additional source of circulating Ketones that the body can use as fuel. Researchers have therefore investigated whether increasing Ketone availability during exercise could alter energy metabolism or reduce reliance on other fuel sources.

The body naturally produces Ketones when carbohydrate availability is low. Exogenous Ketones allow supplementation to increase blood BHB levels rather than relying solely on the body's own Ketone production.

The two main forms studied in sports nutrition are:

• Ketone salts: BHB combined with minerals such as sodium or potassium.

• Ketone esters: Compounds designed to deliver Ketones more directly and raise blood BHB.

However, raising BHB is not the same as improving athletic performance. That distinction is central to research on Ketone drinks for athletes.

If you want to understand how these beverages work and what they contain, see our guide to what ketone drinks are.

What Does Research Say About Ketone Drinks and Sports Performance?

Research on Ketone drinks and sports performance is mixed, with studies reporting positive, neutral, and negative outcomes. Differences in Ketone formulation, amount, timing, exercise intensity, carbohydrate intake, and the type of performance test may contribute to the inconsistent findings.

Some Studies Found No Performance Benefit

Several studies found that increasing blood Ketones did not produce a measurable improvement in exercise performance. This suggests that the metabolic effects of Ketone drinks do not automatically translate into faster times, greater power output, or greater endurance.

This distinction matters for athletes evaluating Ketone drinks because a supplement can have a measurable physiological effect without improving the outcome that matters most in competition.

Some Studies Reported Reduced Performance

Some research has found that Ketone supplementation may impair performance in particular exercise settings.

For example, a study involving professional cyclists found that consuming a Ketone diester before exercise increased blood Ketone levels but impaired time-trial performance by approximately 2%. The study also reported gastrointestinal discomfort and increased perceived exertion.

This finding is one reason athletes should not assume that taking Ketone drinks before competition will automatically improve performance.

Some Studies Reported Performance Benefits

A small number of studies have reported performance benefits from exogenous Ketones under specific conditions, particularly when Ketones were combined with carbohydrate.

One influential study found improved performance in trained cyclists after they consumed a Ketone ester together with carbohydrate during a cycling protocol. The researchers also observed changes in fuel metabolism.
However, subsequent research has not consistently reproduced these findings.

Overall, the evidence remains mixed and does not show that Ketone drinks reliably improve athletic performance.

Are Ketone Drinks Good for Endurance Sports?

Ketone drinks are particularly interesting for endurance sports, but current research has not established a consistent endurance-performance benefit. Long-duration exercise has received considerable attention because Ketones can serve as an alternative metabolic fuel.

Endurance athletes may be interested in Ketones because events such as cycling races, marathons, triathlons, and ultra-endurance competitions can place substantial demands on energy stores.

Researchers have therefore investigated whether exogenous Ketones could alter fuel use during prolonged exercise. However, the evidence remains inconsistent.

A review of Ketone supplementation in sports found that most studies did not demonstrate a clear acute performance advantage, although longer-duration exercise remains an area of ongoing research.

Can Ketone Drinks Help During Long-Distance Events?

There is not enough evidence to conclude that Ketone drinks improve performance during long-distance or ultra-endurance events.

The theory is that Ketones could provide an additional fuel source during prolonged exercise. However, laboratory findings do not always translate into better results during real-world competition.

Factors such as exercise intensity, carbohydrate availability, gastrointestinal tolerance, and the type of Ketone supplement can all affect the outcome. For this reason, Ketone drinks for athletes should not be considered a proven endurance-fueling strategy.

Do Ketone Drinks Help With Recovery?

Research on Ketone drinks and recovery is promising in some areas but remains inconclusive. Some studies have observed changes in glycogen synthesis or muscle-related signaling, but these findings have not consistently translated into measurable improvements in recovery.

For example, one controlled human study found that a Ketone ester increased muscle glycogen synthesis under specific experimental conditions following exercise.

However, another study found that adding a Ketone ester to carbohydrate and protein did not increase muscle glycogen resynthesis despite changes in muscle signaling.

Research examining muscle recovery has also produced mixed results. This means athletes should not assume that Ketone drinks accelerate recovery simply because they increase blood BHB.

More research is needed to determine whether particular athletes, supplement types, or recovery situations may benefit.

Ketone Drinks vs. Traditional Sports Nutrition

Ketone drinks and traditional sports nutrition serve different purposes, and current evidence does not support replacing established carbohydrate fueling with Ketone drinks.

For athletes researching Ketone supplements in sports drinks, the key point is that Ketones are an emerging supplement category, not an established replacement for carbohydrate-based sports nutrition.

Can Ketone Drinks Cause Stomach Problems?

Yes, gastrointestinal symptoms can occur after consuming Ketone drinks, particularly depending on the type and amount of Ketone provided.

Reported symptoms in research have included:

• Nausea

• Stomach discomfort

• Abdominal symptoms

• Diarrhea

A study comparing different exogenous Ketone drinks found that gastrointestinal symptoms varied by formulation and amount consumed.

This matters for Ketone drinks for athletes because gastrointestinal discomfort during training or competition can interfere with performance.

Athletes should therefore evaluate individual tolerance during training before considering a new supplement for an important event.

For a broader discussion of potential side effects, product types, and factors that may affect individual considerations, see our guide to whether Ketone drinks are safe.

What Should Athletes Focus on Before Trying Ketone Drinks?

Athletes should prioritize established performance factors such as training, appropriate carbohydrate intake, hydration, sleep, and recovery before experimenting with Ketone drinks.

Ketone supplementation remains an emerging area of sports nutrition research.

Athletes who choose to experiment with Ketone drinks for athletes should consider:

• Testing the product during training first.

• Evaluating gastrointestinal tolerance.

• Avoiding a new supplement for the first time on competition day.

• Considering how the product fits with their existing carbohydrate strategy.

• Checking the supplement's ingredients and applicable sport regulations.

Final Answer: Do Ketone Drinks Actually Improve Athletic Performance?

Current research does not show that Ketone drinks consistently improve athletic performance. Exogenous Ketones can raise BHB levels and alter fuel metabolism, but studies have reported mixed results for endurance, time-trial performance, power output, and recovery.

Some research has reported benefits under specific conditions, while other studies have found no improvement or impaired performance.

For that reason, Ketone drinks for athletes are better described as an emerging area of sports nutrition research than as a proven performance enhancer.

Athletes should continue to prioritize established strategies such as appropriate carbohydrate fueling, hydration, training, sleep, and recovery while research into exogenous Ketones continues.

FAQs

What are exogenous Ketones?

Exogenous Ketones are Ketones supplied from an external source rather than produced naturally by the body. Ketone drinks commonly provide them as Ketone salts or Ketone esters.

What is BHB in Ketone drinks?

BHB, or beta-hydroxybutyrate, is one of the main Ketone bodies found in the blood. Many Ketone drinks are designed to temporarily increase circulating BHB after consumption.

Can athletes take Ketone drinks with carbohydrates?

Yes. Athletes can consume Ketone drinks alongside carbohydrates, and sports research has studied this combination. However, research has not consistently shown that adding exogenous Ketones to carbohydrate fueling improves performance compared with carbohydrate strategies alone.

How long do Ketone drinks increase BHB?

Ketone drinks can temporarily increase blood BHB, but the duration and magnitude of the increase depend on the type of Ketone, amount consumed, and individual response.

For a closer look at BHB timing and how long elevated Ketone levels may last, see our guide to how long Ketone drinks last.

Are Ketone drinks the same as Ketone supplements?

Ketone drinks are one type of Ketone supplement. Ketone supplements can also come in other forms, while Ketone drinks specifically deliver exogenous Ketones in liquid form.

Do professional athletes use Ketone drinks?

Researchers have studied Ketone supplementation in professional and elite athletes, particularly endurance cyclists. However, research involving professional athletes has produced mixed performance results, so athlete use should not be interpreted as proof that Ketone drinks improve performance.

Are Ketone drinks allowed in competitive sports?

Athletes should check the current rules of their sport and the governing anti-doping organization before using any supplement. The complete ingredient list matters because a product may contain ingredients beyond the Ketones themselves.

Sources & Expert Research

• Valenzuela et al. — Perspective: Ketone Supplementation in Sports—Does It Work?
  Reviews the evidence surrounding Ketone supplementation, exercise performance, metabolism, cognition, and recovery.
  PMC

• Margolis et al. — Utility of Ketone Supplementation to Enhance Physical Performance: A Systematic Review
  Reviews randomized controlled trials investigating physical-performance outcomes following Ketone supplementation.
  PMC

• Evans et al. — Metabolism of Ketone Bodies During Exercise and Training
  Provides background on Ketone metabolism and the physiological rationale for exogenous Ketone supplementation.
  PMC

• Leckey et al. — Ketone Diester Ingestion Impairs Time-Trial Performance in Professional Cyclists
  Examines Ketone supplementation and time-trial performance in professional cyclists.
  PMC

• Stubbs et al. — Gastrointestinal Effects of Exogenous Ketone Drinks
  Examines gastrointestinal responses to different exogenous Ketone formulations.
  PubMed

• Robberechts & Poffé — Ketone Supplementation and Recovery/Training Adaptation
  Reviews emerging evidence around Ketones, recovery, and training adaptation.
  PubMed

• Recent systematic review of exogenous Ketones and athletic performance
  Examines contemporary evidence on BHB responses and athletic-performance outcomes.
  PubMed

• TrainerRoad — Science of Getting Faster: Bicarbonate and Ketones
  Provides an athlete-focused discussion of research into Ketones and bicarbonate.
  TrainerRoad