To answer that question, we're going to break down the methods that can get you the results you want in the least possible time. We're going to let you in on a couple of tips and tricks that you will need to know before trying out the diet yourself. We guarantee you that these tips will help you achieve success in your chosen diet quickly and easily.
So long long does it take to get into ketosis? This transition could take anywhere from 48 hours to one week. The length in time will vary depending upon your activity level, lifestyle, body type and carbohydrate intake. There are several ways you can speed up this process, like intermittent fasting, drastically decreasing your carb intake and supplementation.
Hi.. I’ve recently started drinking Keto OS Max and have lost about 20 pounds in the past 4 weeks without strictly sticking to the keto diet and have not exercised once. The only issue I have with Keto OS is the price really. I am wondering how the other BHB/MCT products like Ketond and PerfectKeto compare to Keto OS and what product on the market comes closest to the Keto OS recipes beneficial ingredients. TIA
Exogenous ketones have become a popular nutritional supplement since their introduction in 2014. Unfortunately there is a lot of inaccurate information and marketing you have to read through to find the truth about them. This article does the hard work for you. It gets right to the true benefits and drawbacks of exogenous ketones supported by research studies.
Our bodies are produce three types of ketone bodies for fuel: beta-hydroxybutyrate (BHB), acetoacetate (AcAc), and acetone. Each is used by the body differently. Acetone is the least abundant, produced in much smaller amounts, and is usually exhaled through the lungs rather than being used as fuel.3 Acetoacetate is part of the metabolic pathway whereby humans make and use ketones, but it tends to be found in the blood at lower levels than BHB.
Onnit is an incredible company that’s making a massive impacts in the lives of athletes in nearly every sport. From Olympic Gold Medalists, to NFL middle linebackers, Onnit has taken athletic performance to a new level. Providing supplements, food, and training equipment, Onnit was an early adopter of the elite performance booster that is exogenous ketones!
As repeated KE consumption would be required to maintain nutritional ketosis, we investigated the kinetics of drinks in series and of continuous intra-gastric infusion. During starvation, the accumulation of ketones (>4 mM) reportedly inhibited ketone clearance from the blood, however the underlying mechanism is unknown (Hall et al., 1984; Wastney et al., 1984; Balasse and Fery, 1989). In Study 3, βHB uptake and elimination were identical for the second and third KE drinks, suggesting that βHB may have reached a pseudo-steady state should further identical boluses have been given at similar intervals. Furthermore, when the KE was given at a constant rate via a NG tube, blood ketone concentrations remained ~3 mM. Therefore, repeated KE drinks effectively maintain ketosis at the intervals and doses studied here.

Ketone Salts: While the body uses and makes BHB ketones salts naturally, in supplement form ketone salts are synthetically (lab) made compounds that combine sodium (and/or potassium, calcium, or magnesium) with BHB. The salt is used to raise the pH and make things less acidic. Currently, all ketone supplements on the market are made from ketone salts. While they raise ketone levels, most people will only experience mild nutritional ketosis (~0.6-1.0 mmol/L).


My two cents: I wouldn’t take ketone supps if not on some sort of low(ish) carb diet because the idea of high levels of BOTH fuels (ie, ketones AND glucose) doesn’t seem physiologically appropriate… more like a recipe for disaster, and by “disaster,” I mean “out-of-control production of Reactive Oxygen Species” — this might not matter if you’re an athlete looking for a quick performance boost, because the fuels are going to be cleared rather quickly… not so much if you’re a desk jockey.
My two cents: I wouldn’t take ketone supps if not on some sort of low(ish) carb diet because the idea of high levels of BOTH fuels (ie, ketones AND glucose) doesn’t seem physiologically appropriate… more like a recipe for disaster, and by “disaster,” I mean “out-of-control production of Reactive Oxygen Species” — this might not matter if you’re an athlete looking for a quick performance boost, because the fuels are going to be cleared rather quickly… not so much if you’re a desk jockey.
Firstly, in a randomized four-arm cross-over study, blood βHB concentrations were compared following ingestion of equal amounts of βHB as a KE or a KS at two doses by healthy volunteers at rest (Study 1; n = 15). Secondly, in a randomized five-arm cross-over study, inter- and intra-participant repeatability of ketosis was examined following ingestion of identical KE drinks, twice whilst fed and twice whilst fasted. As a control, participants also consumed one isocaloric (1.9 kCal.kg−1) dextrose drink (Study 2; n = 16). Finally, blood d-βHB was measured after equal amounts of KE were given as three drinks (n = 12) or a constant nasogastric (NG) infusion (n = 4) (Study 3; total n = 14) over 9 h.
Im very excited about this product! I received it about a week ago and it helped me break my month+ plateau! I've been on a keto diet since mid-April and had lost 10 lbs but stalled out. Ill be honest, the after taste is not pleasant but I'll take it since it's working. I've lost 12.5 lbs and going strong. Feeling better than ever. Would recommend and buy again!
There have been studies done on long term ketogenic diets. This 2004 paper inn Experimental & Clinical Cardiology titled ‘Long-term effects of a ketogenic diet in obese patients’ concluded that obese patients following a ketogenic diet for 24 ‘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.’
Slowly ramp up your ketone intake. Be patient! 🙂 For many of us, our bodies aren’t used to running on ketones, so you can expect an adjustment period. Try ¼ scoop first. Transitioning to ketosis removes water from our bodies, so getting lots of water will help with any dehydration and stomach issues. Ramp up from there, trying ½ scoop the second week or when you feel it’s appropriate, and then try a whole scoop 1-2 weeks in. You can use it for extra energy or to help get into ketosis if you aren’t there already. Most people use it 0-3 times per day.
The liver is always producing ketones to some small degree and they are always present in the bloodstream. Under normal dietary conditions, ketone concentrations are simply too low to be of any significant benefit. A ketogenic diet and exogenous ketone supplements will increase the amount of ketone in your body. The idea that  ketones are “toxic” is ridiculous. Ketones are a normal physiological substance that play many important roles in the human body.

We will go deep in the science behind this fascinating diet and then review some of the best exogenous ketone supplements out there in the market. Because without the knowledge and the right information about exogenous ketones that you can properly follow, you might never reach your goals and you may as well keep eating that mashed potato for dinner and club sandwich for lunch.
Do I still follow a ketogenic diet? Not anymore. I was strict keto for 12 weeks – enough time to experiment and learn about it. I did enjoy parts (lots of fat!) but I don’t see it as a sustainable way of eating, nor did I benefit from it health or sports performance wise (more on this in an upcoming article). But, I was following a strict keto diet – sans carbs. I think if I were to follow a ketogenic diet AND incorporate a regular carb refeed then the results may be different.
I am a little confused. I can see how EK’s can help up the state of ketosis, but as far is weight loss is concerned, aren’t the ketones you produce naturally created by the breaking down of your own fat? If I supplement with exogenous ketones, will that slow the natural creation of ketones? Especially if I am eating a higher amount of carbs. Would exogenous ketones speed fat loss, or slow it?
Over the years, we have seen and heard many different things about the effects and benefits of Raspberry Ketone supplements. Be it capsules or sprays, the discussion around them actually working always had opposing sides. So, we decided the best solution was to do our own research by conducting our own reviews on the most talked about products, to find out exactly how good they were as a "top-rated" ketone supplement.

I am confused on the diet part. I’ve tried ketogenic diets and have experienced great health benefits (I’m diatabetic), but it also helped with sleeping through the night, increased energy, appetite suppression, and balancing of hormones. However forcing myself to eat fat and eliminate God foods like fruit, and trying to keep ratios of fat to protein to carbs was really hard for me. Can supplementing with the exogenic Ketones while having a diet of Proteins, veggies, fruits, healthy fats (avacado, cocnut oil, etc) and some grains (brown rice), produce ketosis?


Great question. So if you are already in nutritional ketosis from your diet, exogenous ketones would still help raise ketone (energy) levels when you want that (maybe for focus at work or energy at the gym. They also help get you back into ketosis after cheat meals and skip the “keto flu” which is the period when your body is using up stored glycogen.
Response inhibition is the ability to suppress inappropriate responses that interfere with goal-directed actions. Two cards are shown, one above the other, each containing the name of a color in a certain color. The goal is to rapidly indicate if the meaning of the color on top (i.e. “yellow”) matches the color of the color on the bottom (i.e., card says “red” but is colored yellow).

For the past few million years, the only way for humans to make use of ketones for fuel was to restrict carbohydrates low enough and long enough to induce the liver to make them. This is admittedly hard for many people to do in a world that still believes that dietary carbs are good and fats are bad. An emerging alternative is to consume ketones as a dietary supplement. The research into how these function in the body and what benefits they can confer remains early stage, but there are already a number of such products available for sale. In this section, we will discuss how exogenous ketones affect blood ketone levels, and how they may influence health and disease compared to ketones produced within the body.
So if your high-fat diet includes a high amount of roasted seeds or roasted nuts, nut butters, heated oils such as heated coconut oil or heated extra virgin olive oil, barbecued meats or meats cooked at very high temperatures, then your triglyceride count is going to go up. You should have triglycerides that are less than 150mg/dL, and a triglyceride to HDL ratio that is no more than 4:1, and in most of the healthiest people I’ve worked with, triglycerides are under 100 and the triglyceride to HDL ratio is less than 2:1. If your ratio is whacked, your ketogenic diet isn’t doing you any favors.’
Your body is trained to use glucose as its main energy source, but when you decrease your consumption of carbs, your body turns to another source of energy that is naturally produced by our own bodies--fat. Therefore, a great way to lose weight faster is to consume low-carb fruits, vegetables and other food that are specially designed for a low-carb diet.

Exogenous ketones have become a popular nutritional supplement since their introduction in 2014. Unfortunately there is a lot of inaccurate information and marketing you have to read through to find the truth about them. This article does the hard work for you. It gets right to the true benefits and drawbacks of exogenous ketones supported by research studies.
To enter ketosis, up to 80%of your daily calories should come from fat. To put this into a frame of reference, if you eat 2,000 calories a day, 1,600 of those calories should come from fat sources. This comes out to roughly 144-170 grams of fat. Both quantity and quality are equally important, so consume fats from high-quality sources, like omega-3 and omega-6 fatty acids.
Intermittent fasting will significantly help the body transition into ketosis as limiting your consumption of food for that many hours will help deplete the system of any excess glucose. It’s a shock to the system and research has shown that daily fasting can have other profound effects aside from weight control such as autophagy, lowering risks of heart disease and diabetes, as well as an improvement in cognitive function. So if you’re still wondering how to get into ketosis in 24 hours, then fasting will surely kick things into gear!

As repeated KE consumption would be required to maintain nutritional ketosis, we investigated the kinetics of drinks in series and of continuous intra-gastric infusion. During starvation, the accumulation of ketones (>4 mM) reportedly inhibited ketone clearance from the blood, however the underlying mechanism is unknown (Hall et al., 1984; Wastney et al., 1984; Balasse and Fery, 1989). In Study 3, βHB uptake and elimination were identical for the second and third KE drinks, suggesting that βHB may have reached a pseudo-steady state should further identical boluses have been given at similar intervals. Furthermore, when the KE was given at a constant rate via a NG tube, blood ketone concentrations remained ~3 mM. Therefore, repeated KE drinks effectively maintain ketosis at the intervals and doses studied here.


Usually, you’ll find exogenous ketones in the form of powdered ketone salts. Less common are ketone esters, which are the purest form of ketones. Griffin says they work quickly (in 10 to 15 minutes, as opposed to an hour for the salts) and effectively, but they’re more expensive, have a more-revolting taste, and are harder to find (HVMN is one U.S. company that sells them). People also use medium-chain triglyceride (MCT) oil — or partially manmade fats — to put the body into a state of ketosis.
While exogenous ketones (EK) are a newer supplement, having entered the market for consumers in just the past few years, scientists have been synthesizing ketone bodies in a lab since the 1960’s. They were useful for scientists studying their use for specific disease conditions, most notably childhood seizure disorders, though they were prohibitively expensive for consumers (1, 2).
 Effects of beta-hydroxybutyrate on cognition in memory-impaired adults. – Glucose is the brain’s principal energy substrate. In Alzheimer’s disease (AD), there appears to be a pathological decrease in the brain’s ability to use glucose. Neurobiological evidence suggests that ketone bodies are an effective alternative energy substrate for the brain. Elevation of plasma ketone body levels through an oral dose of medium chain triglycerides (MCTs) may improve cognitive functioning in older adults with memory disorders. On separate days, 20 subjects with AD or mild cognitive impairment consumed a drink containing emulsified MCTs or placebo. Significant increases in levels of the ketone body beta-hydroxybutyrate (beta-OHB) were observed 90 min after treatment (P=0.007) when cognitive tests were administered. beta-OHB elevations were moderated by apolipoprotein E (APOE) genotype (P=0.036). For 4+ subjects, beta-OHB levels continued to rise between the 90 and 120 min blood draws in the treatment condition, while the beta-OHB levels of 4- subjects held constant (P<0.009). On cognitive testing, MCT treatment facilitated performance on the Alzheimer’s Disease Assessment Scale-Cognitive Subscale (ADAS-cog) for 4- subjects, but not for 4+ subjects (P=0.04). Higher ketone values were associated with greater improvement in paragraph recall with MCT treatment relative to placebo across all subjects (P=0.02). Additional research is warranted to determine the therapeutic benefits of MCTs for patients with AD and how APOE-4 status may mediate beta-OHB efficacy.
Great question. We can’t see any reason this can’t be a part of a successful weight loss program on the ketogenic diet. In the morning with coffee is a very popular way to raise ketone levels in the morning. See if you are on pace with your goals and perhaps try a week with a different breakfast to see what feels best. Also – new article might be helpful here too: https://perfectketo.com/exogenous-ketones-for-weight-loss/ Good luck! 🙂
*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease. Information on this site is provided for informational purposes only, it is not meant to substitute medical advice provided by your physician or any other medical professional. You should not use the information contained on this site for diagnosing or treating a health problem, disease, or prescribing any medication. Please read product label before use. Best results are only achieved when combined with diet and exercise program. Results not typical for any or all claims.
Now onto the best ketone supplements. All of these 5 are great products with good customer experiences and reviews. The list contains 3 MCT oil powders and 2 BHB salts. Since it’s just 5 products, there’s no room for bad quality. If you see a lower rating it may be due to price/value, the taste or perhaps a lack of third-party inspection certificates.

[1] Shannon L. Kesl, corresponding author Angela M. Poff, Nathan P. Ward, Tina N. Fiorelli, Csilla Ari, Ashley J. Van Putten, Jacob W. Sherwood, Patrick Arnold, and Dominic P. D’Agostino (2016). Effects of exogenous ketone supplementation on blood ketone, glucose, triglyceride, and lipoprotein levels in Sprague–Dawley rats. Nutrition & Metabolism, 13(9)
All data are presented as the mean ± standard deviation (SD). Data analysis was performed using GraphPad PRISM™ version 6.0a and IBM SPSS Statistics 22.0. Results were considered significant when p < 0.05. Triglyceride and lipoprotein profile data were analyzed using One-Way ANOVA. Blood ketone and blood glucose were compared to control at the applicable time points using a Two-Way ANOVA. Correlation between blood βHB and glucose levels in ketone supplemented rats was compared to controls using ANCOVA analysis. Organ and body weights were analyzed using One-Way ANOVA. Basal blood ketone and blood glucose levels were analyzed using Two-Way ANOVA. All mean comparisons were carried out using Tukey’s multiple comparisons post-hoc test.
Not only is Ketōnd considered one of the best on ketone supplements the market it also currently holds favorable ratings, reaching numbers as high as 98 percent in customer reviews. They absolutely love this product and you will too if you give it a try. You will get some incredible results. Whether you are a busy professionals, athlete, on-the-go moms or dads, or college students you too will love this product.
Ketone monoester and diester compounds may circumvent the problems associated with inorganic ion consumption in KS drinks. KE ingestion rapidly increased blood ketone concentrations to >5 mM in animals (Desrochers et al., 1995a,b; Clarke et al., 2012a) and the first oral, non-racemic KE for human consumption, (R)-3-hydroxybutyl (R)-3-hydroxybutyrate, raised blood βHB concentrations to 3–5 mM in healthy adults (Clarke et al., 2012b; Shivva et al., 2016) and athletes (Cox et al., 2016; Holdsworth et al., 2017; Vandoorne et al., 2017). However, the pharmacokinetics and pharmacodynamics of this KE with confounding factors, such as prandial state or multiple KE drinks, have not been characterized.
Animal research findings report that BHB supplementation also enhances oxygen utilization, especially in the central nervous system (CNS).[11] While molecular oxygen is a crucial molecule for health and longevity, too much of it can be potentially toxic and speed the effects of aging in tissues throughout the body.Therefore, using a BHB supplement can effectively mitigate the toxic buildup of molecular oxygen, particularly in the CNS/brain.
Next, BHB salts are the only supplement that elevates BHB levels while muscle glycogen remains at capacity (low muscle glycogen can drastically impede long-duration athletic performance). In short, athletes who consume carb-based diets, and those on low-carb diets, stand to benefit from exogenous ketone supplements taken prior to training/exercise.
This may have been mentioned, I haven’t checked all comments, but glutamine causes gluconeogenesis so that may explain why it affects Ketosis. Whenever I took a glutamine powder supplement for gut healing, I noticed I would “feel” less Ketogenic and I knew it was affecting me adversely. Glycine (which is also in bone broth) also has this effect I believe. Apparently some amino acids are just more easily converted to glucose.
Blood d-βHB, pH, bicarbonate (HCO3-) and electrolytes measured in arterialized blood samples from resting subjects (n = 7) following a ketone ester or salt drink containing 3.2 mmol.kg−1 of βHB. Shaded areas represent the normal range. Values are means ± SEM. (A) Venous blood d-βHB. (B) Arterialized blood pH. (C) Blood bicarbonate. (D) Blood potassium. (E) Blood sodium. (F) Blood chloride. †p < 0.05 difference between KE and KS, *p < 0.05 difference from baseline value.
It was like getting the benefits of a five-day fast in just 15 minutes! As my body and brain began sucking up the ketones, I felt a rush of energy and my mind became very sharp and focused in ways beyond what I attain doing an extended fast. But in this case it was the 40g of ketones I had just consumed. Even at the two-hour mark, when I took my last reading, I was still in deep ketosis.
Glucose and BHB went down slightly throughout the effort and RQ fell, implying a high rate of fat oxidation. We can calculate fat oxidation from these data. Energy expenditure (EE), in kcal/min, can be derived from the VO2 and VCO2 data and the Weir equation. For this effort, EE was 14.66 kcal/min; RQ gives us a good representation of how much of the energy used during the exercise bout was derived from FFA vs. glucose—in this case about 87% FFA and 13% glucose. So fat oxidation was approximately 12.7 kcal/min or 1.41 g/min. It’s worth pointing out that “traditional” sports physiology preaches that fat oxidation peaks in a well-trained athlete at about 1 g/min. Clearly this is context limited (i.e., only true, if true at all, in athletes on high carb diets with high RQ). I’ve done several tests on myself to see how high I could push fat oxidation rate. So far my max is about 1.6 g/min. This suggests to me that very elite athletes (which I am not) who are highly fat adapted could approach 2 g/min of fat oxidation. Jeff Volek has done testing on elites and by personal communication he has recorded levels at 1.81 g/min. A very close friend of mine is contemplating a run at the 24 hour world record (cycling). I think it’s likely we’ll be able to get him to 2 g/min of fat oxidation on the correct diet.

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