Ketones naturally exist in the body, being created during the process of fat metabolism and are therefore safe to consume even during pregnancy or breastfeeding. Supplements such as Ketologie’s PROBHB are simply providing ketones from an external (exogenous means literally ‘outside of the body’) source. However, if you suffer from any medical conditions and/or are on medications, it is always advisable to consult your health care provider prior to starting any new nutritional or dietary supplement.  
Ketogenic Diets and Physical Performance – Impaired physical performance is a common but not obligate result of a low carbohydrate diet. Lessons from traditional Inuit culture indicate that time for adaptation, optimized sodium and potassium nutriture, and constraint of protein to 15–25 % of daily energy expenditure allow unimpaired endurance performance despite nutritional ketosis. (http://nutritionandmetabolism.biomedcentral.com/articles/10.1186/1743-7075-1-2)
Ketosis supplements made in poor quality, have proven to lead to side-effects such as constipation and increased levels of cholesterol and triglycerides in men, and women may also experience amenorrhea or other disruptions to the menstrual cycle. This is why it is really important to know what combination of compounds you are consuming, particularly while you are on this very strict diet because the wrong balance can really mess with you in the long term and won't give you the high performance that you are looking for. 
There’s some support that exogenous ketones can be helpful for people already dutifully following the keto diet — but research has been limited. One thing we know for sure: These aren’t a get-thin-quick solution. “I think people are drawn to a quick, easy fix, kind of a magic bullet supplement, and it’s not that this won’t contribute to weight loss, but it’s not that magic bullet,” Griffin says.
Been using yur stuff for the last week and tyere is absolutely no change in the amount of ketones based on the ketone strips i use to monitor ketone levels. I use another product as well and switched back and have sustained higher levels of ketones most of the day. Is there a reason that your product doesnot produce the results based on the strip test? I am a larger guy, 260 possibly need more? I have 2 tubs to go through and am not overly optimistic about whats going on.
Hi. Thanks for the informative article! I have fallen down the exogenous ketone rabbit hole for the last 2 days trying to figure everything out. I am currently on a nutritional ketonic diet but after 8 months, I am finding it difficult to stay on it 100%. I would like to remain on a low-carb diet, but also have a little more flexibility in my food choices. If you take the expense out of the equation, which product would you recommend for someone who wants to use ketosis as a method of weight loss? Thank you so much.
It was explained to me that exogenous ketones inhibit lipolysis (breaking down of fat cells), therefore triglycerides should be expected to go down. They theorize that ketones may promote transfer of triglycerides from blood into cells, which primes the pump for fat burning, but to verify would require conducting biopsies to measure blood versus tissue.
Second, there are inherent metabolic differences between boosting ketones via diet and boosting ketones via supplements. On a ketogenic diet, ketones go up because you’re converting body and dietary fat into ketone bodies. A rise in endogenous ketones means you’re burning fat and building the requisite machinery to metabolize the new energy source. On exogenous ketones, ketones go up because you ate some ketones; conversion of body and dietary fat into ketone bodies goes down if anything.
Most supplements rely on BHB as the source of their exogenous ketone bodies. BHB is converted to acetoacetic acid with a small quantity converted to acetone through a acetoacetate decarboxylase waste pathway. Some of the acetoacetic acid will enter the energy pathway using beta-ketothialase, which converts acetoacetic acid to two Acetyl-CoA molecules (see diagram below2).
Miriam, Thank you for the questions. I am going to do my best here to provide you with answers: Q: The manufacture of BHB salts involves ionic bonding of an anion (beta-hydroxybutyrate) with a cation (Na+, K+, Ca+, Mg+). At least one of the exogenous ketone products you listed does in fact contain potassium ions. People taking potassium-sparing drugs need to know this and that raises concerns about leaving it off your chart. A: The table lists the BHB and the mineral content from the BHB salts (no added minerals). Therefore, since potassium BHB is not in any of the… Read more »
I interviewed Dr. Brianna Stubbs, a ketone researcher with a Ph.D. in Metabolic Physiology from the University of Oxford who is now Research Lead at HVMN, specializing in developing ketone esters. She told me that in terms of science on the ketone salts and their effect on physical performance, one of the most-cited benefits of ketone salts, the scientific studies that have been done show at best no effect on physical performance and that, currently, there is no peer-reviewed scientific research on the ketone salt products on the market.

I simply use this to attempt to reduce the symptoms of the "keto-flu" when I'm entering ketosis after blowing my carbs out. The holidays are particularly bad for falling off the keto band-wagon. I've used this three times now to transition back into ketosis and I can report that it does seem to reduce the effects of the keto flu (headache, weakness) that I'd normally experience transitioning back into a low-carbohydrate diet. I typically take it for 3 days and then stop because by that time I'm in ketosis again, but I'd imagine you could take it longer.


The keto-esters are more appropriate for delivering higher doses of BOHB, but with repeated dosing can push the limits of taste and GI tolerance. There has been fairly extensive research on a compound 3-hydroxybutyl 3-hydroxybutyrate that is converted via hydrolysis and liver metabolism to yield 2 molecules of ketones, presumably mostly D-BOHB (Clarke 2012 and 2014). In a study involving lean athletes, an approximate 50 gram dose raised blood BOHB levels to 3 mM after 10 min and reached 6 mM by 20 min. Submaximal exercise resulted in increased ketone disposal from 2 to 3 hours and contributed significantly to whole body energy use during exercise (Cox 2016). This product has been shown to significantly reduce appetite after a single dose (Stubbs 2018) but its effect on body weight in humans over a longer period of time has not been studied, nor has its effect on blood glucose control been reported in humans with type 2 diabetes. However a single dose prior to a glucose tolerance test in healthy humans reduced blood glucose area-under-curve by 11% and non-esterified fatty acid area-under-curve by 44% (Myette-Cote 2018).


Your body uses the energy source that is the easiest to use, in our case this is glucose. Glucose is just a type of sugar. As our body cannot store glucose as such it stores the extra glucose in form of glycogen that is stored in our liver and muscles. To initiate production of ketones in your body as fast as possible you must deplete your body of glycogen reserves. The best way to do this is a simple 24 hours fast. This will deplete your glycogen stores as fast as possible. If you don’t over eat for dinner or you even skip it all together you will already wake up in state of mild ketosis the next morning due to the overnight fast. Here are also described some signs that you are in Ketosis already.


Dominic D’Agostino has two in-depth interviews on The Tim Ferriss Show (Part 1, Part 2). Discussion includes exogenous ketones for mitigating the onset of neurodegenerative diseases, using ketones in place of fasting for chemo-protection, benefits of ketone supplementation when consuming carbohydrates, the risks and potential toxicities of ketones.
Intense exercise — more than just fidgeting or pacing — uses ketones, when glucose is in short supply, which means the body has to create more ketones to replace what you use. This is great for those who are used to a moderate to intense activity level, but intensity is a fine dance between encouraging ketone production and elevating cortisol for the rest of us.
This is delicious! I'm not sure what people are talking about when they say it tastes bad. I put a half scoop only (because its soooo expensive) in my iced coffee with have cream every morning and it tastes better than it ever did without. I'm not sure its really working and it does upset my stomach. I will have to get some strips to check ketosis and will come back to update. I think I'll probably still only give three stars though because it is WAY WAY WAY OVERPRICED! I can't believe how small the container was when it arrived for almost $60!! Even if it works, and it does taste delicious, I can't justify this kind of price point. This is such a bad business model. You probably get people to buy this once, maybe twice at this price, whereas if you made it more affordable, like double the product (an actual month's supply) you'd have customer's for life! Drop the price and I will buy again for sure!

In Summary, I think it’s important to do your own research and draw your own conclusion about the long term risks of ketosis. For some people, a ketogenic diet may be a necessity given their health situation. For those of us who do not suffer from such health conditions I would present the question ‘why do you want to follow a strict ketogenic diet for an extended period’, and then follow this up with ‘are the potential risks and sacrifices worth the benefits?’
and by the way! the product you’re marketing has way too much salt – it will negate the true, natural process of any keto diet. salt will make you retain water, which is exactly what you don’t want to do, if you ever really want to lose weight! and if higher than normal blood pressure is your goal, enjoy responsibly! in fact, if you lower your overall salt intake, you will shed much more water weight in the first weeks, as mentioned elsewhere.. one of the secret cheats to get you going. drinking plenty of water and frequent urination will keep you properly hydrated – just be aware when testing with urine strips, too much water will give you a lower reading. stay hydrated, stay healthy – have fun losing the weight!
There are three types of ketones produced when you’re on ketogenic diet: acetoacetate, beta-hydroxybutyrate (BHB), and acetone. The kinds that you’ll find in your supplements are BHB because your body can readily use and absorb them. This means that not all ketones are created equal and there are several different types, each with unique properties that are worth considering when shopping.
The ‘carb-sparing’ effect from BHB suppresses the break down of muscle glycogen. This leads to lower lactate levels. When increasing exercise intensity, fat oxidation (burning) reaches a limit. At that point the muscle burns carbohydrates as fuel. But when consuming Ketone esters, the body does not make this switch. This suggests Ketones are being used instead. 11
Do you need carbs to train? No. Again this is an anecdote only, but I have done numerous training sessions in a carb deprived state. Heck some of my best training sessions where done in a fasted, carb deprived state. And there are a lot of endurance athletes who are using a ultra-low carb/ketogenic diet and putting up some great times (more on this below).

The challenge for me is what 80% fat looks like. If I eat 1500 calories a day – mostly veggies and protein – how do I best get the fat? I can eat an avocado with my meals, olive oil on my salads, cook my eggs in coconut oil, but I am not clear on how to eat so much fat the healthy way while keeping calories at a lower amount. I eat once – twice a day. I am not a fan of eating tons of saturated fat – bacon on everything is bad advice I have seen pushed out on other pages. Eating Keto does not mean eating high fat meats for your fat. Healthy is the focus. How to eat a heavy veggie, low protein, high fat diet the most healthy way? The calculations are challenging on a tight schedule for one trying to get started :)I would love some solid advice.
Although decreases in FFA, TG and glucose occurred, there were no significant differences between the KE and KS drinks or with intake amount. Ingestion of ketone drinks significantly decreased overall mean plasma FFA from 0.7 to 0.4 mM, TG from 1.1 to 0.9 mM and glucose from 5.7 to 4.8 mM after 1 h (all p < 0.05). Concentrations were the same as at baseline by 4 h, with FFA at 0.6 mM, TG at 0.9 mM and glucose 5.1 mM (Figures 2A–C). There was a rise in insulin concentrations 30 min following all drinks, probably due to the small amount of carbohydrate in the sweetener (Figure ​(Figure2D2D).

Miriam, Thank you for the questions. I am going to do my best here to provide you with answers: Q: The manufacture of BHB salts involves ionic bonding of an anion (beta-hydroxybutyrate) with a cation (Na+, K+, Ca+, Mg+). At least one of the exogenous ketone products you listed does in fact contain potassium ions. People taking potassium-sparing drugs need to know this and that raises concerns about leaving it off your chart. A: The table lists the BHB and the mineral content from the BHB salts (no added minerals). Therefore, since potassium BHB is not in any of the… Read more »


Effects of ketone supplementation on basal blood ketone and basal blood glucose levels: Rats administered ketone supplements did not have a significant change in basal blood ketone levels (a) or basal blood glucose levels (b) for the four week study. Two-Way ANOVA with Tukey’s post-hoc test, results considered significant if p < 0.05. Error bars represent mean (SD)
Task switching is the process of adapting to changing circumstances (switching from one goal to another). Two cards are shown one above the other, and a combination of letter and a number (i.e., “A4”) will appear on one of the two cards. If it appears on top, the task is to indicate whether the number is an even number, and if on the bottom the task is to indicate whether the letter is a vowel.
I wrote this post at about the same time Germany won the World Cup in Rio de Janeiro in 2014. There’s been a lot of moving and shaking in the world of exogenous ketones since then, not to mention soccer. Looking back on my post, I still consider it relevant in terms of what exogenous ketones possibly can (and cannot) do for performance. In this case, to see if exogenous ketone esters provide me a “boost” by allowing me to do the same amount of work while expending less energy (and work at a relatively lower VO2) compared to no supplementation.

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