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.  

If you are new to ketosis and don’t know much about it, it is a metabolic state, where your body preferentially uses ketones (instead of glucose) for energy. This can lead to a host of different health benefits. If you’d like to learn more about ketosis, what ketones are, and how to benefit from these, feel free to read through our guides: What is Ketosis? What is the Ketogenic Diet? What Are Ketones?
This process can be used as a way to get you into ketosis more quickly, so you can transition gracefully into a ketogenic lifestyle or as a way to stimulate autophagy and fat loss. If you can’t go without fat for the full 3 day fast — it’s okay — you will still illicit many of the benefits of fasting by limiting your protein and carbohydrate intake.
In conclusion, drinks containing exogenous ketones, in either ester or salt form, can raise concentrations of blood βHB in humans, although elevation of l-βHB lasts longer after racemic KS consumption. Both KE and KS drinks mildly altered acid-base balance. Exogenous ketones lowered blood glucose and lipids without inhibiting endogenous insulin secretion. The KE delivered highly repeatable blood concentrations of d-βHB, although ketosis was decreased by a meal. Uptake and elimination of d-βHB were similar when several drinks were consumed in succession. The dietary KE could maintain ketosis using drinks taken regularly around a normal meal pattern, or using a continuous infusion via a nasogastric tube. Therefore, ketone drinks are a viable and practical alternative to dietary strategies to achieve ketosis.
Most of the information regarding the effects of ketosis come from studies on the ketogenic diet, wherein ketones are made by the liver and become a major fuel source for the body. The ketogenic diet is currently under investigation for its potential therapeutic effects in a number of healthy and disease states. More recently, studies are beginning to reveal that many of the effects observed with the ketogenic diet are mechanistically attributable to ketones, which is a primary reason that exogenous ketones are being developed and studied. However, because they are such a new technology, there’s not a lot of data on exogenous ketones themselves. In a few pre-clinical studies, exogenous ketones have mimicked the therapeutic effects of the ketogenic diet”
Directions — — As a dietary supplement, mix 1 scoop of ketone powder with 8-12 oz of water To avoid gastrointestinal discomfort, start with 1/2 scoop (or even less) and gradually increase to a full serving. Best consumed prior to exercise to enhance performance. Do not exceed 3 scoops per day. As a dietary supplement take 1 serving of PX Ketotropin twice daily. Ideally the 1st servings (4 capsules) should be taken prior to the first meal of the day. Consume 2nd serving 30 minutes prior to strenuous physical activity. If no physical activity is performed please consumer 2nd serving prior to afternoon meal. Additional servings can be taken in between meals throughout the day if needed. Do not consume more than 6 servings of PX Ketotropin
Getting enough sleep not only helps in the production of growth hormones vital for muscle growth, but it plays a particular role as already discussed. If you’re intermittently fasting then sleep is crucial is helping you sustain the fast. 6-10 hours of your day will be dedicated to sleep, helping you to reboot and not think about food during this time. That means less time for you to actually be fasting! Stress is another factor – if we don’t get enough sleep, we’ll tend to feel more stress and agitation throughout the day. Ensuring that we’re well rested plays a huge part in keeping down cortisol levels so that are insulin and blood sugar levels don’t spike.
To be in ketosis, you need to get very specific about the macronutrient ratios hanging off your fork. This means eating 75% fats, 20% protein and 5% carbohydrates. It’ll see you getting 5-10% of your total calories from carbohydrates, which is roughly 25-30g of carbs per day, and diligently keeping this below the 50g threshold creates the ketosis that burns stored fat. Unlike the no-limit-protein option on the table when going low carb, eating more than 0.67-0.81g of protein per pound of bodyweight can hoof you out of ketosis because too much of it can be converted into glucose, blunting the benefits of the ketones. On the plus side, you will have a high fat intake, making your energy levels more balanced so you can train at higher intensities.
“Consumption of KETO//OS before exercise can result in significant decreases in oxygen demand and increases in performance. We recommend 30 minutes before a workout. Note: Pre-workout use is recommended after building up to a full dose. The best way to maximize energy, appetite control and sustain energy is to take KETO//OS first thing in morning. To maximize benefits, build up to 1 serving 3 times daily – morning, afternoon and early evening. May be used with carbohydrate supplements if desired or by itself as a non-carb, highly efficient energy source.”
If you ever wondered how to get into ketosis, know that getting into ketosis is easy and completely natural for your body. All you need to do is follow the ketogenic diet which involves cutting down on carbs and eating lots of fat. You can also get into ketosis through fasting. But if your goal is weight-loss and reaping all the benefits of ketosis, the ketogenic diet is a must.
However, it's important to NEVER overlook the power of exercise and of course sticking to a proper routine to get the most optimized results. The most common mistake people make is by treating any keto supplement like a "wonder drug" that will help them shred weight in their sleep. Seriously... how is that even scientifically possible. So if you are thinking about trying out a particular supplement, I would suggest two things:

Some common short-term effects that some people experience in the early stages of the process are excessive thirst, fatigue and keto constipation. These minor side-effects occur due to a sudden change to a persons diet, but as I said, once your body starts to adjust to the process, you will start to feel normal again, if not better than before you started. We understand that constipation isn't exactly fun, but it's a small price to pay to experience the long-term health benefits. 


Will taking exogenous slow down my fat loss? Since now before digging into my body for energy/ketones, I will first use up the exogenous ketones I ingest. Also do exogenous ketones somehow help get even more keto adapted, keeping in mind I have been on a strict keto diet without a problem and don’t mind it at all. Outside of performance improvements, do you think exogenous ketones is for someone like me who is primarily looking for fat loss.

The many roles of magnesium include helping us maintain normal nerve and muscle function, as well as heart rate, supporting a healthy immune system, regulating blood glucose levels, and making energy production and protein synthesis possible[23]. Magnesium is also involved in both aerobic and anaerobic energy production. ATP synthesis (the body’s energy source) depends on enzymes that are activated by magnesium.


If you do the same calculations as I did above for estimating fat oxidation, you’ll see that EE in this case was approximately 13.92 kcal/min, while fat oxidation was only 67% of this, or 9.28 kcal/min, or 1.03 g/min. So, for this second effort (the test set) my body did about 5% less mechanical work, while oxidizing about 25% less of my own fat. The majority of this difference, I assume, is from the utilization of the exogenous BHB, and not glucose (again, I will address below what I think is happening with glucose levels).
The current USDA recommendations reflect “unachievable goals” that do not match what research suggests our normal physiological ranges might be[10]. There is not enough evidence to show that sodium restriction is associated with less mortality or cardiovascular morbidity in healthy individuals or individuals with high blood pressure, and there is evidence that sodium restriction might actually be harmful to individuals with heart failure[11]. For serious athletes, and individuals who are active daily, the current recommendations might not only be unwise but unsafe. If you are eating a carbohydrate-restricted diet, this applies to you even more. Don’t stress about the high amounts of sodium in a lot of these ketone supplements, being that they allow for a fast delivery of ketones to the body, which has unique benefits that will be discussed in a separate article.  Instead, change out the frozen dinner and experiment with an effective dose of exogenous ketones.
Exogenous ketones drinks are growing in popularity as a method to elevate blood ketone concentrations and mimic a ketogenic diet without the need for dietary changes (Ari et al., 2016; Cox et al., 2016; Kesl et al., 2016; Caminhotto et al., 2017; Evans et al., 2017). The present study describes the pharmacokinetic and pharmacodynamics properties of ketone ester and salt drinks in humans at rest, and characterizes the effects of a prior meal, which is pertinent to use as a dietary supplement. The main findings were that KE drinks elevated blood d-βHB > 50% higher than KS drinks, the latter significantly increasing blood l-βHB, which was metabolized more slowly by the body. Both drinks had similar effects on FFA, TG, glucose and electrolyte concentrations, although with disparate effects on pH. A prior meal decreased total blood d-βHB appearance after a KE drink. Finally, either three KE drinks or nasogastric feeding effectively maintained nutritional ketosis over 1 mM for 9 h.
I had heard horror stories about how bad ketone esters tasted (like “rocket fuel”!) so was prepared for the worst. I followed their instructions and drank the contents of the bottle in one gulp, then chased it with a sip of sparkling mineral water. While not the most pleasant aftertaste, the flavor wasn’t any worse than after a shot of well tequila. Within 15 minutes I was already well into therapeutic ketosis, and after 30 minutes my ketone meter displayed a “HI” error message (meaning my level was greater than 8.0 mmol/L)!
Long-Term Effects of a Ketogenic Diet in Obese Patients – The present study shows the beneficial effects of a long-term ketogenic diet. It significantly reduced the body weight and body mass index of the patients. Furthermore, it decreased the level of triglycerides, LDL cholesterol and blood glucose, and increased the level of HDL cholesterol. Administering a ketogenic diet for a relatively longer period of time did not produce any significant side effects in the patients. Therefore, the present study confirms that it is safe to use a ketogenic diet for a longer period of time than previously demonstrated.
One common concern regarding the KD is its purported potential to increase the risk of atherosclerosis by elevating blood cholesterol and triglyceride levels [55, 56]. This topic remains controversial as some, but not all, studies have demonstrated that the KD elevates blood levels of cholesterol and triglycerides [57–62]. Kwitervich and colleagues demonstrated an increase in low-density lipoprotein (LDL) and a decrease in high-density lipoprotein (HDL) in epileptic children fed the classical KD for two years [27]. In this study, total cholesterol increased by ~130 %, and stabilized at the elevated level over the 2-year period. A similar study demonstrated that the lipid profile returned to baseline in children who remained on the KD for six years [63]. Children typically remain on the diet for approximately two years then return to a diet of common fat and carbohydrate ingestion [64]. The implications of these findings are unclear, since the influence of cholesterol on cardiovascular health is controversial and macronutrient sources of the diet vary per study. In contrast to these studies, the majority of recent studies have suggested that the KD can actually lead to significant benefits in biomarkers of metabolic health, including blood lipid profiles [65–72]. In these studies, the KD positively altered blood lipids, decreasing total triglycerides and cholesterol while increasing the ratio of HDL to LDL [68–77]. Although, the KD is well-established in children, it has only recently been utilized as a strategy to control seizures in adults. In 2014, Schoeler and colleagues reported on the feasibility of the KD for adults, concluding that 39 % of individuals achieved > 50 % reduction in seizure frequency, similar to the results reported in pediatric studies. Patients experienced similar gastrointestinal adverse advents that have been previously described in pediatric patients, but they did not lead to discontinuation of the diet in any patient [78].
The second ketone ester compound was developed at the University of South Florida. This is a diester of AcAc and BDO. In rodents, this ketone ester raises blood D-BHB to 1-4 mM and blood AcAc to up to 5 mM.19 There is one published study of this ketone ester in humans; results showed a 2% decrease in 31 km cycling time trial performance.16 This may be due to the high rate of side effects of this ester studied. Other factors may have been low levels of BHB (<2 mM), the short, high-intensity time trial used, or the use of AcAc vs. BHB.
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.
Beta hydroxybutyrate floats around in your blood, and importantly, can cross different barriers to be able to be turned into energy at all times. One of the most important areas where this happens is in the brain. The blood-brain barrier (BBB) is usually a very tightly regulated interface that doesn’t allow the transfer of many molecules, but since BHB is such a rock star and so hydrophilic, your brain knows to let it in so it can bring energy to the party at any time. This is one of the main reasons why increased levels of ketosis lead to improved mental clarity, focus and reduction in neurodegenerative diseases.

Dusty you assume only everyone wants fat burning. I think this is silly. The brain and heart will prefer ketones over carbohydrates when both are present in the blood stream. Look at the research and mechanism. I don’t want fat loss, I want better brain function. I also regularly eat carbs myself. This is one of the reasons I myself use exogenous ketones. No this isn’t a magic fat loss powder, but don’t sit here and quote T-nation trying to rebuttal this article acting like that is a credible source.


Exogenous ketones don’t seem to improve high-intensity, glucose-intensive exercise, increasing fat burning during steady state exercise but dropping top-end high-intensity performance. Another study found that ketone dieters reduced 50-minute time trial performance in cyclists, though another group of researchers have criticized the methods. Even when a ketone ester didn’t improve performance in the shuttle run to exhaustion and 15 meter sprint repeats, it did reduce the drop in brain function following the exercise.


In terms of epigenetic signaling, initial studies of the effects of BOHB on class-1 histone deacetylase activity against oxidative stress (Schimazu 2013), NLRP3 inflammasome suppression (Youm 2015), mouse longevity (Roberts 2017), and other epigenetic regulatory effects suggest that levels as low as 1 mM have potent effects. Furthermore, the association between very mild ketonemia and reduced coronary mortality with SGLT2 inhibitor use in patients with type 2 diabetes (Ferranini 2016) suggests that there might be clinical benefits with chronic BOHB levels as low as 0.3 mM (Gormsen 2017. Vetter 2017).

Another factor to consider is that in nutritional ketosis the liver makes a steady supply of ketones and continuously releases them into the circulation. In contrast, most ketone supplement protocols involve bolus intakes that don’t mimic the endogenous release pattern. The extent to which this impacts metabolic and signaling responses across different tissues remains unclear.


Nutritional ketosis induced with the KD has proven effective for the metabolic management of seizures and potentially other disorders [1–26]. Here we present evidence that chronic administration of ketone supplements can induce a state of nutritional ketosis without the need for dietary carbohydrate restriction and with little or no effect on lipid biomarkers. The notion that we can produce the therapeutic effects of the KD with exogenous ketone supplementation is supported by our previous study which demonstrated that acutely administered KE supplementation delays central nervous system (CNS) oxygen toxicity seizures without the need for dietary restriction [29]. We propose that exogenous ketone supplementation could provide an alternative method of attaining the therapeutic benefits of nutritional ketosis, and as a means to further augment the therapeutic potential of the KD.
I’m not sure whether I am leto-adapted but have been following the keto program for about 6 weeks. The scale and the eye confirm I have been burning fat. I’ve been using ketostix to keep track of ketones as I don’t prefer to prick my fingers to get blood measurements. I have reached my weight loss goal and planning to transition to maintenance in the next couple of weeks. I’m curious if exogenous ketones will be aid in maintaining my weight.

For whatever reason, many patients won’t attempt a ketogenic diet—even if the evidence is clear that it could help. Doctors are often hesitant to recommend dramatic dietary shifts—even if they believe in their efficacy—to patients who are already dealing with difficult health issues. If you’ve got a picky kid with epilepsy, a pickier adult with Alzheimer’s, or a cancer patient who refuses to give up the familiar-yet-non-ketogenic foods that give him some small manner of comfort in this trying ordeal, exogenous ketones could make a big difference.
The effects of the two exogenous ketone drinks on acid-base balance and blood pH were disparate. In solution the ketone salt fully dissociates (giving a total of 3.2–6.4 g of inorganic cation per drink), allowing βHB− to act as a conjugate base, mildly raising blood and urine pH, as seen during salt IV infusions (Balasse and Ooms, 1968; Balasse, 1979). Urinary pH increased with the salts as the kidneys excreted the excess cations. In contrast, KE hydrolysis in the gut provides βHB− with butanediol, which subsequently underwent hepatic metabolism to form the complete keto-acid, thus briefly lowering blood pH to 7.31. Electrolyte shifts were similar for both KE and KS drinks and may have occurred due to βHB− metabolism, causing cellular potassium influx and sodium efflux (Palmer, 2015).

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.
As for MCT oil (and oil powders), powder formulations tend to cause less digestive distress (e.g. probiotics), but some folks object to the additional ingredients like sunflower lecithin or soluble corn fiber). Even if you’d like to eventually settle on an oil, I’d recommend starting with a powder to see how you respond and to give your body the chance to adapt over time.
Lastly, EK products in general ​are usually in the form of salts, which is why they are referred to as BHB Salts. The BHB ketones are bound to common salts such as sodium​, calcium, magnesium and potassium​ to improve absorption rate. These salts are also the core electrolytes your body needs to help you avoid feeling mentally drained and physically lousy during the keto-flu transition period.
All of the data I’ll present below were from an experiment I did with the help of Dominic D’Agostino and Pat Jak (who did the indirect calorimetry) in the summer of 2013. (I wrote this up immediately, but I’ve only got around to blogging about it now.) Dom is, far and away, the most knowledgeable person on the topic of exogenous ketones. Others have been at it longer, but none have the vast experiences with all possible modalities (i.e., esters versus salts, BHB versus AcAc) and the concurrent understanding of how nutritional ketosis works. If people call me keto-man (some do, as silly as it sounds), they should call Dom keto-king.

Affiliate Disclosure: There are links on this site that can be defined as affiliate links. This means that I may receive a small commission (at no cost to you) if you purchase something when clicking on the links that take you through to a different website. By clicking on the links, you are in no way obligated to buy.

Medical Disclaimer: The material on this site is provided for informational purposes only and is not medical advice. Always consult your physician before beginning any diet or exercise program.

Copyright © lowcarbtransformation.com

×