Ethan R.
Verified Customer
Incredible product! Tastes great, works fast, and gives me a huge boost for both workouts and mental tasks. The gold standard.

KetoneAid Ke4 Concentrate

KetoneAid Ke4 Concentrate

 (5166 Reviews)
$29.98
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1. Potent & Pure Ketone Fuel
⚡️ Experience the power of 12.5g of pure (R)-1,3-Butanediol. It's a highly efficient ketone source that rapidly elevates blood ketone levels for instant energy and mental clarity.

2. Zero Sugar, Zero Compromise
🚫 Made with only 4 clean ingredients and absolutely no sugar, artificial sweeteners, or preservatives. Supports your keto or low-carb lifestyle without spiking insulin.

3. Accelerate Recovery & Performance
💪 Designed for elite results. KE4 helps reduce post-workout inflammation, accelerate muscle recovery, and enhance both physical and cognitive performance.

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INGREDIENTS

This Ketone Ester is a Ketone Monoester (KME), a bond of D- Beta Hydroxybutyrate and R 1,3 Butanediol. It's the primary molecule utilized in 90% of exogenous ketone clinical trials. Other ingredients: Purified Water, Stevia, Inulin, Natural Flavors, Citric Acid, Potassium Sorbate.

HOW TO USE KE4

  • STARTERS

    Many customers consume as little as 5ml of Ke4 daily. Therefore, a 3 pack can last up to 36 days. However, theaverageintake is double this amount. On a per effective gram basis, Ke4 Concentrate is still the most cost-effective exogenous ketone (vs. salts, diols, or other "esters").

  • NOT FOR WEIGHT LOSS

    While it may be used to help skip meals and for fasting, this product is NOT designed for weight loss.It will not burn fat for you. We recommend watching this video explaining exogenous ketosis vs endogenous ketosis or this extended videoon why most supplements don't contribute to long-term weight loss.

  • ADVANCED

    Elite athletes might opt for a full bottle of Ke4, especially aftera multi day race, however, such a high intake is typically excessive and if taken during a performance, it could even hinder performance.

  • TASTE

    Our "Very Scary Cherry" flavor improves upon the earlier "rocket fuel" taste, but it still is very rough and more like a shot of apple cider vinegar. If it's not to your liking, we suggest trying our diluted, decent tasting Ketone Shot.

    PEAK PERFORMANCE FUEL

    KetoneAid's KE4 is a premium, scientifically-formulated ketone supplement designed for individuals seeking the pinnacle of cognitive and physical performance. It delivers a powerful, pure dose of ketones to efficiently fuel your brain and body, helping you break through limits and achieve your peak state.

    THE ULTIMATE KETONE FUEL IS

    THE PURE PERFORMANCE EDGE

    KetoneAid's KE4 delivers 12.5g of 100% pure (R)-1,3 Butanediol - the most efficient ketone precursor available. This scientifically-backed formula powers elite athletes and high-performers seeking unmatched mental clarity and physical endurance. Far superior to ketone salts or MCT oil, KE4 provides rapid ketosis with zero sugar or artificial ingredients. The pure performance edge. Nothing else compares.

    different ketones, different results

    THE REAL SCIENCE

    Beware of "Fake Ketones" that engage in misleading "science hijacking" - using clinical findings for Ketone (Mono)Ester as if they applied to their inferior 'diol' or salt-based formulas. KE4 contains pure (R)-1,3 Butanediol - the most efficient ketone precursor backed by legitimate research. Don't settle for substitutes that can't deliver the same rapid ketosis, mental clarity, and performance benefits. Stick with the proven science of KE4 for results others only claim.

    BACKGROUND

    THE REAL SCIENCE

    Beware of "Fake Ketones"! Many claim to be "backed by science," as they engage in misleading "science hijacking" - using Ketone (Mono)Ester clinical findings as if it were for their inferior ketones. Stick to the science-backed Ketone (Mono)Ester if you want to experience the results of what other Fake Ketones claim.

    KetoneAid is one of only two current suppliers of Ketone (Mono)Ester. KetoneAid has been selected for human trials at Harvard, Duke, KU Leuven, Aarhus, Dublin City U., Auburn, U. of Michigan, U. of Alabama and several others.
    Studies below typically use 25g Ketone (Mono)Ester, but not necessarily KetoneAid.

    • 15%

      Recover Better(+15% watts, 15% faster TT)

    • 38%

      Boost In Muscle Energy Stores Overnight In Sprinters

    • 4%

      Improved Running Economy
      (Ketones Alone vs Sugar)

    • 17%

      Decreased Ghrelin(Decreases Appetite)

    • 7%

      Increased Cognitive Performance(Smarter)

    • 87%

      Improved Brain Network Stability

    • 90%

      Reduction In Wakefulness After Sleep Onset (WASO)

    • 30%

      Reduction In Lactate Levels & Preserved Cognitive Function

      WHAT ARE KETONES?

      Ketones are known as "The 4th Fuel" (vs. carbs., protein and fat), providing energy when other fuel sources fall short. The body naturally converts fat to ketones after a several day fast, once a state of ketosis is achieved. However, drinking ketones can achieve many of the benefits without adhering to a strict keto diet.

      KETONE ESTER HAS FAR-REACHING BENEFITS.

      We urge you to do your own research and ask your health care professional about what Ketone Ester can do for you!

      3RD PARTY KETONE EFFICACY CLINICAL

      NO OTHER KETONE COMES CLOSE

      2008 -Awarded to

      Dr. Veech Dr. king & NlH for Ketone Ester research

      To preserve cognitive function and alertness in soldiers on missions up to seven days without food.

      2019-Present

      Cutting-edge Clinical Trials

      .

      Over a dozen human clinical trials are using KetoneAid Ketone (Mono)Ester - The King of Ketones

      2022

      KetoneAid signs Quick-Step World Tour Cycling Team

      After years of secret use by 90% of the Tour De Franceteams, Quick-Step partners with KetoneAid.

      KETONEAID KETONE ESTER

      FEATURED IN

        KE4 KETONE ESTER BECOMES AVAILABLE TO THE PUBLIC

        KetoneAid launches a $25k Indiegogo campaign, yet raises $130,000. KetoneAid was the 1st to market.

        KetoneAid continued to scale up with their in house, USA-based, production for the next 12 months.

        HVMN launches their (same molecule) Ketone Ester a couple months later, yet stopped in early 2020.

        Customer Reviews

        • ★★★★★

           Taste & Effectiveness Perfected

          Finally, a high-potency ketone that actually tastes good and goes down easy! The simple flavor profile is refreshing with no chemical aftertaste. The effects are consistently fast and powerful. My go-to for both mental and physical challenges.

          Daniel P.

        • ★★★★★

          Unmatched Mental Clarity

          The focus and mental clarity I get from KE4 is incredible. It completely eliminates brain fog without the jitters of coffee. I take it before deep work sessions and my productivity has skyrocketed. It's a game-changer for anyone who needs to be sharp.

          Sean K.

        • ★★★★★

          The Purest Ketone Fuel

          I've tried many ketone supplements, but KE4 is in a league of its own. The 4-ingredient, zero-sugar formula is what sold me. No stomach issues, no weird aftertaste—just clean, rapid energy. You truly get what you pay for: purity and potency.

          Justin M.

        • ★★★★★

          My Secret Weapon for Fasting

          This makes my 18-hour intermittent fasts effortless. It powerfully curbs hunger and provides sustained energy. I no longer fight cravings or feel drained. It’s the perfect tool to stay energized and in ketosis while fasting.

          Chris H.

        • ★★★★★

          Accelerates Recovery

          As a cyclist, recovery is key. Drinking KE4 after a hard ride drastically reduces my muscle soreness. I feel refreshed and ready for the next day's training, not wiped out. It’s a crucial part of my regimen now.

          Brandon J.

        • ★★★★★

          Instant Ketosis, No Keto Diet

          I don't follow a strict keto diet, but with KE4, I can experience the benefits of ketosis in minutes. The energy boost is immediate and clean. It’s fantastic for giving me a performance edge without dietary restrictions.

          Adam F.

          FAQs

          Is a ketogenic diet required? (No)

          No, it is not. Unlike the weaker Ketone Salts, the Ketone Ester can be used by non-Keto people.

          Can anybody take it?

          Not for kids and pregnant women. Seek medical advice if used outside of sport.

          Can it be used for weight loss?

          No. We strongly discourage people from buying ANY exogenous ketones for weight loss. None will burn fat for you, and it is not real "ketosis". However, it may suppress your appetite.

          What is the difference between Ketone Ester and Ketone Salts?

          Two main differences:

          First, most Ketone Salts are only 50% bioavailable (only half of it can be used by the body as fuel).

          Secondly, the Salts have a MASSIVE salt load, which may be fine for a week, but after which, good luck getting your rings off.

          What's the difference between Ketone Ester and Diol?

          Different Ketones, Different Results. Diol has an inebriating effect, and nil to negative effect on performance. Some companies use 'science hijacking' (using Ketone Ester data) to confuse customers into thinking it is a performance drink.