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🚀 Unlock pro-level energy & focus with the King of Ketones!
KetoneAid KE4 Ketone Ester Concentrate is a premium, science-backed exogenous ketone supplement delivering 2.5g of pure ketone ester per serving. Trusted by elite athletes and rigorously tested for safety and compliance, it offers 100% bioavailability without caffeine or sugar. Designed to boost athletic performance, mental clarity, and metabolic health, KE4 is the gold standard ketone ester made in the USA and suitable for non-ketogenic lifestyles.














| Asin | B07S7F9X9Z |
| Best Sellers Rank | #794 in Blended Vitamin & Mineral Supplements |
| Date First Available | March 21, 2019 |
| Manufacturer | KetoneAid |
| Package Dimensions | 3.82 x 1.26 x 1.18 inches; 3.21 ounces |
User
KetoneAid KE4 - very effective and worth the money!
I ordered KetoneAid KE4 and received it in a reasonable timeframe. The bottles in my order were the newer plastic bottles, and they were sealed well with no leakages.I typically fast intermittently, anywhere from 16-18 hours a day (I have done longer fasts before) and try to stay low-carb whenever possible. I have tried strict Keto but that doesn’t always work out for me. I’ve also used bib salts and other ketone supplements (from cheaper to more expensive — both salt pills and flavored powder packets). I was 15 hours into my fast on the first day that I took KetoneAid. I’d already had 2 cups of dark roast coffee (black) and plenty of water with electrolytes. I had also watched several of the FAQ videos on the KetoneAid website and Youtube channel, so I had some sort of understanding about how these ketone esters functioned.Apparently, I missed the video about ketone esters and caffeine, because I started with 1 capful (5ml) and had a VERY caffeinated rest of the day. If you’re a heavy coffee/caffeine drinker, I would recommend dialing back on that while you figure out how the ketone esters will affect you.I started the next day with 5ml (1 capful) first thing in the morning, which helped to give me some subtle mental clarity. I did have a cup of coffee an hour later, but only partially out of habit. I took another capful a few hours later once I realized that my workday was going to get hectic. It really helped me stay focused throughout the day, even while multi-tasking and with multiple distractions. It helped to curb my appetite throughout the day, which is surprising since my stomach will sometimes still act up and demand food when I’m trying to fast while stressed out.I worked out about 6-7 hours after my second capful, and noticed a slight difference in that I didn’t feel as tired after my workout. I don’t know if it’s too soon to experience enhanced endurance from the additional ketones in my body, but just something I noticed.As for the taste? Well, some have described it as “jet fuel.” Having never tasted fuel of any kind before (and never will, lol), I will say that it was like taking a shot of very strong alcohol. Something between tequila and everclear liquor. I think it’s supposed to be flavored, but it didn’t really help when taking the esters as a straight shot (with no chaser). I might try it with a chaser (fizzy water, juice, etc.) but it’s honestly not that big of a dealbreaker for me.I expect that the 3 bottles that I purchased will last at least 18 days since I don’t plan on having 10 ml every day; I should be ok with 5ml on some days. I am keen to try it with longer fasts (48+ hours) but that is for another time. I will definitely be purchasing again. While the price might seem a bit high for 3 small bottles, the price I paid for KetoneAid KE4 is still less than what I was paying for flavored ketone salts/powder which I previously purchased from another company. Also, ketone salts are not the same as ketone esters. Esters are more potent by far. If you want to add ketone esters to your daily routine, whether it’s for keto support, fasting, mental clarity or sports performance, I would recommend purchasing a bottle (or 3) of KetoneAid KE4 and experiencing its benefits for yourself. Don’t expect to drop weight just because you’re downing shots of KE4, though. You will still have to eat healthy meals, get some exercise and take care of your body. I haven’t tried any other products from this company, but I certainly will be doing so in the very near future.
User
Why I use KE4 BHB Ester.
#1 it works.#2 The CEO, Frank LLosa is accessible to customers via phone or Facebook (KetoneAid), and he is a no BS (honest and knowledgeable) professional. I have called him several times with questions. So yeah, customer service is second to none.#3 I have consumed 6 KE4 bottles to date (with many more to go) in support of both standard of care, and non-standard of care medical protocols (for mRNA signalling benefits and normal cell protective) reasons (NOT diet weight-loss and NOT physical athletic performance). KE4 has always delivered measurable results as advertised and expected (I measure Ketones/Glucose with a KetoMojo meter). I am normally Ketogenic, and KE4 is there for me when my Ketone levels fall off due to various reasons.My limited research and understanding on KE4:KE4 Converts directly into usable chemical energy also supporting various cell signalling (as per a growing volumes of animal and Human N=1 research -- which shows Ketones protect cells, supports OxPhos energy metabolism, and enables medical protocols designed to suppress normal cell glycolytic pathway functions leading to pyruvate/lactate production). KE4 (BHB) also supports improved cognition as-well-as motor function (why most people take it).Taste:It tastes like a chemical fuel. I personally don't have an issue with the taste, but I can understand why babies, girls, and girly men would. Its really not that bad -- but I'm not using it casually as a diet aid either. If you consume KE4 subliminally (hold it in your mouth and under the tongue for an extended time, before swallowing) it should get absorbed faster into the blood for immediate use.Price:While it appears the price is high, it is very reasonable for what it actually is (non-racemic ester) and for what it does (converts directly into AcetylCOA).First, its 100% bio-available -- 100% -- (not 50% or less-- like many/most BHB-Salt based products).Second, BHB ester has been the chemical gold standard for some time -- used in research labs only -- it was unavailable commercially -- and it was price prohibitive: priced in the thousands of dollars just over a year or so ago. KE4 is the real deal, now available commercially for NOT thousands of dollars. Most folks just don't get this.How does KE4 provide 100% bio-available instant ketones? My understanding (and I am not a chemist):I believe this to be an enantiomerically pure ketone ester (non-racemic). (just google it) Racemic BHB products have a left and right side molecule -- thus providing 50% or less available BHB for direct utilization. In other words, KE4 BHB Ester is fully bio-available, so you are receiving full value for the price. You can meter the amount you need for whatever your purpose is. KetoneAid even gives you a little measuring tube with the three container pack. With other racemic BHB-Salt products (right and left hand molecules) only one half (or less) of the ketones are bioavailable.How does KE4 BHB Esters work? This is very important for my personal medical (non-diet/non-athletic performance) application:I believe KE4 is a organic BHB (beta-hydroxy-buterate) ester and it is NOT related to a salt. In the body the liver (primarily) creates ketone bodies as needed (fasted state): Acetoacetic Acid, BHB, and acetone. The energy in our body at the cellular level is ATP. ATP (adenosine triphosphate) powers all mechanical and nerve functions in the body. ATP production (creation) by key organelles (called Mitochondria), found in most cells requires a fundamental chemical building block (Acetyl-CoA) to be available in order for the oxygen phosphorylation chemical process to occur, thus efficiently generating ATP. The free availability of AcetylCOA is also an important signalling state, which is key for my condition, but I will not explain that mechanism in detail here. BHB freely converts to AcetylCOA with Acetoacetate, supporting the mitochondrial production of ATP via the citric acid cycle (Krebs Cycle). KE4 is an ester, so its presents within the body converts directly to usable energy in various tissues. Because BHB esters also pass the blood-brain barrier they will be utilized for energy by the brain (the largest consumer of energy in the body).The down sides of KE4:Because KE4 is not a salt (calcium, potassium, magnesium) it doesn't supplement these electrolytes if your in a fasted state. Having said that, of the 60ml in each small container, 30ml is BHB and 30ml contains beneficial supplementation like Taurine (calcium modulator and anti-oxidant) for cardio support, etc.
User
Bought to use with fasting
I purchased this product myself after doing my own research and am not being compensated for this review in anyway.So it seems different people use this product for different things and I've spoken to many of them. The main use is for endurance sport performance and it seems to excel in this use.I purchased it to help me make it through my fasting periods. During fasting periods I can suffer from low energy and malaise (usually before my body starts burning its own ketones for energy). Taking exogenous ketones won't help your body burn its own ketones or become fat adapted any quicker, in fact it can actually hurt that process a bit, but if the product can help get me through some rougher times the overall outcome could be much better.To that end this product works. That is to say I can get some real lasting energy from this product during my fasting cycles. This has allowed me to continue a non-intense workout regime during these times as well. Also this prevents me from suffering from too much "brain fog" during those times. For this use the product is a success IMO.I have tried to use the product to fuel my body for period of intense exercise. This was not successful for me however. Understanding how ketones fuel the body this was not a surprise to me. Ketones (your bodies own or any others) are not the fuel for intensity.The major con of the product is clearly price. This is offset by not really needing much of the product for what I am using it for. Part of using a new, more experimental product like this for a custom use like I am doing is needing to "dial it in", but this is really true for almost everything diet/exercise related in the world as people'd bodies are vastly different.A major pro with using this product is the support that comes with it. The company owner is generous with his time and answers all my many endless questions in short order.If this product was around during times when I was a serious semi-professional athlete (many years and a lifetime ago) it would have been a literal major game-changer.
User
Short duration of effect
I tracked my ketone levels prior to consumption and then every 15 minutes for two hours using a finger prick and the Keto Mojo meter.After fasting for 16 hours I consumed 30g. My ketone levels rose approximately 2.0. So it did have an effect. The effect lasted only up to 90 minutes and my levels were back to original.Given the amount needed to move the needle and the short time it appears to have an effect I can’t recommend.
User
Amazing for low energy and brain fog if in a glp-1
I was looking for a product that could help alleviate my severely low energy and brain fog on my glp-1 journey. (Reta) Upon taking my first dose fasted in the morning after I woke up, within 5 minutes I felt my brain fog lifting and I had much better energy the rest of the day and my mood was definitely improved. The taste is not the most pleasant but by the second dose it didn’t seem to be as bad just make sure you have a chaser handy! I started off with one bottle just as a test of its effectiveness I will now be placing an order buying in bulk to save some $. If you are on a glp-1 and suffering with low energy and brain fog give this a try! The owner of the brand Frank is amazing joined his Facebook group and he reached out to me asking me how it was going with the Ke-4 this man 100 percent stands by his product and for good reasons.
User
The jury is still out
The jury is still out on KE4 for me. I've been reading that a large number of procyclist and marathon runners are now using these, so that's worth following to see what they find over time.I bought this to use when I was on the keto diet. I used ketone esters when biking, running, and doing demanding manual labor tasks around the house as after starting this diet my body was incapable of keeping up with ketone production necessary to keep me going at a level I was accustomed to on a standard diet. It was very frustrating how fast I would tire.I started with the KetoneAid Shots (2oz ready-to-drink bottle), which worked incredibly well. I was definitely working out in a fuel-deficient mode because within about 5-10 minutes of drinking a 1/2 shot I felt like a turbo had kicked in! The burning in my legs when I pushed up a hill biking or running was gone and I could sustain such an effort much longer. Anyway, those bottles are $8 a piece for 2 shots ($4/shot), so I thought I could get a better deal using the KE4, which I figured I could get down to ~$2.50 a shot if I bought from the manufacturer in bulk. Unfortunately, even mixing my own "shots" with the KE4 using comparable ketone ester amounts, I didn't feel the turbo as much (I switched back and forth between KE4 and the shots a couple times to be sure). KE4 definitely helped, but I seemed to somehow get more from the pre-mixed shots. Note this was purely my subjective perception of the impact it had on my performance. I wasn't doing time-trials or anything to get any form of data (though that would be really interesting to do!).Probably not surprisingly, the longer I did keto, the better my body became at making my own ketones and keeping up with the demand during activity. So again while these definitely helped, the turbo-boost effect became less noticeable over time.I continued using them when I finished up with keto (though still eating lower carbs). I've been testing my blood ketones and am definitely out of ketosis (per published metrics, ketones < 0.5mmol/L) and I'm not sure how much difference adding ketone esters makes. I think it still helps a little, but I'm not racing or anything so the cost/benefit ratio is getting too high for me and I've stopped using it.For someone starting the keto diet, especially if you are very low carb and going after a therapeutic level of ketosis who wants to boost their energy for workouts (or just working), I highly recommend these. I was very happy with the results of doing keto and plan (at least for now) to do the diet at least once per year. So I plan to have these on hand next time to help me maintain my activity level through the early days (at least) of the diet.If you are racing/competing I suspect these can be useful (read up on the pros using it), so if you need that edge the cost/benefit ratio may be worth it to you. You probably should research how the body utilizes these, if you get the desired benefit on day-one or if you need to "train" your body over time to better utilize ketones. It's something that's on my to-do list, just haven't gotten to it yet.
User
LIFE CHANGING!
I’m a repeat customer and I just ordered the 12 pack of the KE4, for great reason. Instead of spending your daily $7 allotment on a cup of coffee from your local coffee shop, use something exponentially more effective.The clarity of mind alone would be enough to order this (especially for gaming/work productivity)... but I use it to speed recovery time from lifting weights, improve quality of sleep and lower inflammation issues. Your expensive latte doesn’t offer all of these benefits. It can benefit keto/modified Atkins dieters (I have switched 2.5 years ago to a fat adapted diet and find MASSIVE benefit from this supplementation) as well as improve performance with non-fat adapted cognitive and physical performance. Just listen to the dosing method videos CEO Frank Llosa puts out on YouTube/FB/on his website. Ketone esters don’t taste great but it’s non issue if you dilute it in a big glass of water or chill it. Also, serving sizes tend to vary depending on the individual.I use KetoneAid when I game (Fortnite/COD) and i feel that I can focus better and stay more calm under pressure, helping my reaction time and aim (like a good fight for a Solo Battle Royale W) or see my k/d go up in COD. I’m having a lot more fun playing when I win more ha! It (+cardio) is becoming a staple in my gaming world, creating a powerful and quantifiable synergy, promoting a flow state for me.Since I’ve been taking this, I have been able to lift consistently, 5 days in a row. This was never an actuality before. I’m recovering like Wolverine and hop out of bed ready to lift. And in hoping out of bed, I’m feeling more rested as well, given a history of sleep issues. Oh yeah, I don’t need to take anything in addition for inflammation which I feel is all tied into better sleep and healing at night. This + a keto diet have been godsend for me.I wanted to see how it affected my mom, so I gave her some of this (she’s in her 60’s) and it’s improved her anxiety, general mood and word recall/conversation fluidity. Makes sense given that glucose nutrient receptors calcify In the brain as we age BUT our ability to utilize fat as a fuel source remains unhindered.Also, Frank ensures wonderful customer service so that shouldn’t ever be an issue.So if you think you’d like to try it for gaming, exercise performance, work productivity, quality sleep, inflammation... don’t hesitate! It may just be your “on switch” or improve your quality of life as it did mine. I think everyone on the planet should see what it’s like to use ketones as a primary fuel source/be fat adapted and KetoneAid is easily the best way.
User
Back on Track and Unstuck
Wow! What a great find. After buying keto salts and being really disappointed because they are bad for blood pressure and things like that which I didn’t learn until later, I found this wonderful product .Ketone Aid really came to my rescue because I wanted something that did not aggravate my health conditions but it was time for me to get back on track and out of my rut with my keto lifestyle.Well the creator said this is not a weight-loss product. I listened carefully to his videos and heard how the different protocols work for training, mental clarity, and staying in ketosis. He was very detailed in the video so I was able to figure out the best way for me to take this to boost myself into ketosis and hopefully create some weight loss.I was very happy to find a way to use this for daily intermittent fasting so that I did not need to experience hunger pangs, wow really ramping up my ke tones. So I’m on the move again my ketones are high and my weight is going down and I feel a boost in energy and clarity after taking the Ketone aid. It’s been one week and I have lost about 7 pounds, OK if that’s water weight and I will continue for another week to 10 days to see how things go.Of course the product does not taste good but if you had ever Had one big swig of cough medicine then you pretty much can handle one big swig of 10 to 15 mL of this product followed by a few gulps of water.The educational videos and the Facebook group were helpful in seeing others stories for sure. Great tool in the Keto lifestyle toolbox for me..👍
User
Great product
Great product
User
Give them a go
I did not enjoy the taste which stoped me from taking them
User
No difference
Didn’t really make any difference to my keto levels. Not really necessary.
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