2) I have a hard time eating real food soon after rides/workouts. I had used Hammer Recoverite (1scoop instead of suggest serving of 2 and add 1scoop whey isolate protein) in the past because I feel a significant difference the day after with less muscle fatigue. Then I read a previous posts on your opinion of post-workout supplementation ( https://bengreenfieldfitness.com/2013/07/what-to-… ) and I realized the primary ingredient in Recoverite is maltodextrin. Since the 2013 article, has anything changed in your research that you might suggest I add PWO to aid in the muscle fatigue/recovery? (In other words, Is there anything more healthy I can take to replace the Recoverite or should the aminos/electrolytes/carbs/MCT’s from the recipe in this article be sufficient?) Thanks in advance, I appreciate all of your work!
I started with completely cutting sugar. This was after B.Cancer. Also estrogen caused I decided to cut carbs to loose body fat which produces estrogen. I kept carbs to 15-20 grams. I researched and learned alot about research, nutrition and health. Primarily it gave me some semblance of control over the Russian Roulette that is cancer, chemo and radiation which all take a mighty toll on your body and mind. It has been 2 years of low carb and intermittent fasting. I have introduced a few seasonal foods, I eat chocolate, and the occasional celebratory cake. Just a bite or 2 not a huge serving. There are several alternative treats that are yummy and satisfying. Not a struggle. I am 67, lost specific fat that I could never shed even on the best eating plan. Belly fat especially. I am 3 years post and hope to live many more years.

A lot of bad information has been put out there due to an extremely large group of people selling exogenous ketones. They were not educated on a proper keto diet or the science behind it and are telling people if you’re not losing weight eat more fat. This I know because I was one of them being told that. I did not lose weight and got tired of eating all that fat. When macros are calculated whatever the fat amount comes out to is meant to be a limit not a goal to meet. Protein is the goal that needs to be met to not lose muscle mass. Fat should not account for 80% of a persons daily intake. If you look up keto books and information from Maria Emmerich you will be correctly informed.
Wow! Amazing article. I don’t read blogs regularly, but I’ll be reading more of yours. I am on day 11 of a fast to get me into ketosis; 7 days bone broth and now on day-4 water only. Intentions are weight loss (10# down, 15# more to go) and immunity improvement/gut help. Planning 9 days of whey water, fermented veggies and mad probiotics when the water days are done (day 14?). After this fast I want to stay fat adapted, start training again and get down to 8% body fat. I believe you have cut that journey significantly with this article. Thank you.

Atkins Nutritionals filed chapter 11 bankruptcy in 2005, a year after the doctor died after falling on an icy New York City sidewalk. Still, Atkins had a long-lasting impact on the dietary landscape in America. “Sugar free” and “low carb” labels never left the snack aisle. People still fell back on the idea that to lose weight, one simply had to cut carbs. But all the while, obesity rates climbed from 30 percent up to 39 percent of the country, priming the stage for another diet “revolution.”


KBs can cross the BBB but not in a homogenous manner. For example, past experiments have demonstrated that BHB utilization is different in various brain areas (Hawkins and Biebuyck, 1979). Areas without BBB, hypothalamic regions and the lower cortical layers have a higher BHB metabolism compared to the lower one of the basal ganglia (Hawkins and Biebuyck, 1979). Also the metabolic meaning of the three KBs is different: while the main KB produced in the liver is AcAc, the primary circulating ketone is BHB. The third one, acetone, is produced by spontaneous decarboxylation of AcAc, and it is the cause of the classic “fruity breath.” Acetone does not have any metabolic functions, but it can be used as a clinical diagnostic marker. BHB acid is not, strictly speaking, a KB because the ketone moiety has been reduced to a hydroxyl group. Under normal conditions the production of free AcAc is negligible and this compound, transported via the blood stream, is easily metabolized by various tissues including skeletal muscles and the heart. In conditions of overproduction, AcAc accumulates above normal levels and a part is converted to the other two KBs. The presence of KBs in the blood and their elimination via urine causes ketonemia and ketonuria. Apart from being the fundamental energy supply for CNS, glucose is necessary for the replenishment of the quota of oxaloacetate, since this intermediate of the tricarboxylic acid cycle (TCA) is labile at body temperature and cannot be accumulated in the mitochondrial matrix. Hence it is necessary to refurnish the TCA with oxaloacetate via the anaplerotic cycle that derives it from glucose through ATP dependent carboxylation of pyruvic acid by pyruvate carboxylase (Jitrapakdee et al., 2006). This pathway is the only way to create oxaloacetate in mammals. Once produced by the liver, KBs are used by tissues as a source of energy (Fukao et al., 2004; Veech, 2004; McCue, 2010): initially BHB is converted back to AcAc that is subsequently transformed into Acetoacetyl-CoA that undergoes a reaction producing two molecules of Acetyl-CoA to be used in the Krebs cycle (Figure ​(Figure22).
I’ve been experimenting with MCT Oil Brain Octane. I have one questions. I’ve been eating about 20 – 25 gr. of carbs per day on a high fat, medium protein diet. I’m measuring ketones in the morning before taking the MCT and after. I’ve been taking btw. 1-2 tbsp of MCT Brain Octane with butter (Bulletproof coffee) – I measure again after 30 min., 1hr, 2 hrs. and don’t see a raise in my blood ketones. Anything I’m missing, would love to hear your thoughts, Ben. – Thx I’m measuring with Precision Xtra and Ketonix Red.
Frankly, the results of my foray into ketosis and eventually keto-adaptation were astounding. I had the best Ironman triathlon season of my life and shocking levels of mental focus and physical ease, especially for races and workouts that lasted longer than two hours. Without experiencing muscle loss, hunger pangs or brain fog, I found I could go the entire day without eating, which was enormously helpful for business and personal productivity. My gas, bloating, fermentation and GI “issues” disappeared. My blood levels of inflammatory markers like HS-CRP and cytokines dropped to rock-bottom, while my levels of good cholesterol, vitamin D, and anti-inflammatory fatty acids skyrocketed.
Ketogenic diets have become popular in recent decades for their demonstrated positive effects on weight loss (Bueno et al., 2013), though the precise mechanism of action is not fully understood (Paoli, 2014). In fact there is contradictory data about KD in mice and rats. In fact, there are contradictory data about KD in mice and rats. For example whilst a huge amount of data confirm that KD in humans is effective in weight reduction, improving lipidemia and glucose tolerance (Bueno et al., 2013), it has been recently demonstrated that a long-term KD (22 weeks) caused dyslipidemia, a pro-inflammatory state, hepatic steatosis, glucose intolerance and a reduction in beta and alpha cell mass, all without weight loss in mice (Ellenbroek et al., 2014). Two considerations should be made: (1) the induction of ketosis and the response to ketosis in humans and mice are quite different and (2) mice and humans have different life spans, and results obtained in mice after several weeks on the diet can correspond to months on the diet in humans (Demetrius, 2005, 2006).

Some people believe elite athletes benefit from keto cycling because their bodies use extra carbohydrates as energy to power through difficult workouts and races. After all, research shows that following the strict keto diet impairs exercise performance. A 2017 study published in The Journal of Physiology found keto hurts athletic performance more than a high-carbohydrate diet or one that includes periods of high carbs and low carbs (which is similar to keto cycling).


You also get incredible gains in metabolic efficiency when you use fat as a primary source of fuel – especially when doing high-intensity interval training – with this one-two combo causing potent 3–5 percent decreases in the oxygen cost of exercise, which is extremely significant. Translated into real- world numbers, this increased fat utilization from carbohydrate restriction and high-intensity interval training would allow you to pedal a bicycle at a threshold of 315 watts, whereas a high-carbohydrate, aerobic-only program (the way most people train) would allow for only 300 watts. Talk to any cyclist and you’ll find out that an 15 extra watts of power is huge in a sport like cycling, and something most cyclists train years and years to achieve.
Many athletes would not consider following a ketogenic diets due to the limited evidence of a performance enhancing effect, the risk of side effects having a negative impact on performance and the difficulty in maintaining the lifestyle changes required to stay in ketosis. Exogenous ketones offer a method to deliver some of the benefits of ketone metabolism without requiring athletes to follow a strict ketogenic diet. Taking exogenous ketones creates a metabolic state that would not normally occur naturally: the state of having full carbohydrate stores as well as elevated ketones.
While it is believed that carbohydrate intake after exercise is the most effective way of replacing depleted glycogen stores,[72][73] studies have shown that, after a period of 2–4 weeks of adaptation, physical endurance (as opposed to physical intensity) is unaffected by ketosis, as long as the diet contains high amounts of fat, relative to carbohydrates.[74] Some clinicians refer to this period of keto-adaptation as the "Schwatka imperative" after Frederick Schwatka, the explorer who first identified the transition period from glucose-adaptation to keto-adaptation.[75]
This is why Gaspari Nutrition chose highly branched cluster dextrin for what we consider to be the gold standard of recovery and performance drinks. This high molecular weight carbohydrate has a special helical structure, which gives it unique properties unlike many of the corn starches or polysaccharides out there. I'll be real with you and say this stuff isn’t cheap, but you certainly pay for what you get, and highly branched cluster dextrin is unlike any carb source I've found – especially if you want to control blood sugar levels and gut issues.
Staying in Ketosis long-term: Chronic Ketosis can cause fatigue, muscle soreness, insomnia and nausea. "Unless you have a medical condition that requires you to stay in Ketosis for long-term, you shouldn't stay in that state for a prolonged period without any carb ups," Mavridis suggests. And if you're a beginner, "it’s recommended that you go through the fat-adaptation phase so that your body becomes accustomed to burning both glucose and fat for fuel," says the nutritionist.
Kite Hill Almond Yogurt, plain. I picked it up at Mother’s Market in SoCal, although I’m sure other nationwide health food chains would carry it. It’s really rich and I enjoy it sprinkled with some New Zealand sea salt crystals. The crunch and saltiness of the crystals really complements the richness and nuttiness of the yogurt. One net carb per serving!!

Many low-carbohydrate diets tout the benefits of being in a state of ketosis, which they claim results in weight loss. The idea is that by not eating enough carbohydrates to use as energy, your body will instead break down fat for energy. As a result, you will lose fat and weight. The idea of ketosis for weight loss, however, does not work as well in reality and comes with many health risks. Talk to your doctor before going on a diet that promotes ketosis.


By combining caffeine, beta-hydroxybutyrate (BHB) salts, MCTs and guarana, KETO WEIGHT LOSS can help your body use fat for energy, increase mental focus, boost endurance and even help control hunger. The BPI Sports supplement offers a smooth release of energy, so you can perform at your best for longer. No worries about the jitters or the crash, the KETO WEIGHT LOSS formula can be taken in the morning or before your workouts to give you the boost you need for increased productivity.*†
The cyclical diet is another one that focuses on more carbs. This is more of a cycle—hence the name. You’ll get five days where you follow the standard diet and then two days where you get more carbs. This sort of diet could be perfect for those who struggle to stick to a plan or just know they wouldn’t be able to last without any potatoes, bread or pasta at all. Think of this like your 5:2 diet, where you get two days off.

Amazing article – gonna have to print it and read it again. To much to break down in one sitting. Thanks Ben – you’ve pulled together so much insight and references that’s given me greater confidence and conviction. I’m 50 and use to be super active and a seasoned athlete but after a few ‘mid life surgical interventions’ I had to find a better way… Ketogenics has been that for me… no more inflammation… I can’t tell you how great it’s been to be pain free! Keep leading from the front.
Beverages: It’s common to become dehydrated on the keto diet. Your insulin levels drop when you restrict carbs, and low insulin makes it harder for your body to retain sodium and water.[9] Drink plenty of plain water, and sip on bone broth to replenish electrolytes, especially during the first couple of weeks when your body is adjusting to the new diet.
Other research further supports the benefits of this diet. For example, the ketogenic diet has been linked to reduced symptoms of Alzheimer’s disease. (4) It may also help manage Parkinson’s disease, control seizures in children with epilepsy, and, according to the results of a small pilot study, may even improve symptoms of polycystic ovary syndrome (PCOS). (5, 6, 7)
Under these circumstances, as soon as the body’s limited reserves of glucose starts to run out, your entire body switches its fuel supply to run almost completely on fat. The levels of the fat-storing hormone insulin levels become very low, and fat burning increases dramatically. You thus get easy access your fat stores, and can burn them off. This is great for losing excess weight. Studies prove that keto diets result in more weight loss, faster. There are also more potential benefits.
I will begin a medically supervised weight loss program on Tuesday, that is intended to put me into ketosis via a very low calorie, high protein diet of shakes for two meals per day and one (controlled) regular meal. The overview of the program says to expect up to 2 weeks of foggyness and crankiness while getting in to ketosis. Will taking KetoCaNa 3 times a day for two days in advance of starting the diet (and during the introduction to the diet) help move me more quickly through the foggy, cranky phase? And should I also be eating (a ketogenic diet) during those two days or only drinking the KetoCaNa? My thanks in advance for any light you can shed on this!
Day 8: I'm still struggling to find a morning beverage that I enjoy and that keeps me full, so I try flavorless collagen protein powder with my coffee plus a splash of macadamia nut milk. It still isn't the same as a French press with cream, but it's a win! On the solid-food front, I'm starting to get a little grossed out about all the meat I've eaten in the past week. It's more than I'd normally eat in three times as long. Lamb burgers, turkey lettuce-wrap tacos, chicken salads. My digestion is off (even though I take probiotics every morning), so Dr. Axe recommends his Keto Digest supplements at lunch. They contain fat-digesting enzymes to help break down the extra fat and protein that my body isn't used to consuming, and it helps.
As a matter of fact, it’s more dangerous to have high levels of cholesterol and high levels of CRP than low levels of cholesterol and high levels of CRP – even if your high levels of cholesterol are “healthy”, big fluffy LDL particles, and not small, dense vLDL particles. In other words, no matter how many healthy fats you’re eating, these fats may actually come back to bite you if you’re creating high inflammation from too much exercise, not enough sleep, exposure to toxins and pollutants, or a high-stress lifestyle.
Don’t stop tracking your ketones when you’re trying to lose weight. An excellent way to keep your ketone levels up is taking exogenous ketones. Just put a scoop in your favorite drink to get back into ketosis — it’s easy and delicious. If you want more keto food inspo, follow Perfect Keto founder Dr. Anthony Gustin (@dranthonygustin). This is how he mixed his iced green tea with Peach & Cream exogenous ketones:
The ketogenic diet — a high-fat and very low-carb eating plan — can be tough to start. After all, it’s likely a radical departure from the way you’re eating now (a typical standard American diet is high in carbohydrates and processed foods). But many people are trying the keto diet, which puts your body in a state of ketosis. That's what happens when your body’s carb-burning switch flips to a fat-burning one, a change that can cause weight loss and has even been credited with controlling diabetes. (1)

Great post!! I’m a 41 year old Master CrossFit athlete, been in keto / LCHF Primal lifestyle for the past 9 years. I feel that my performance has improved a lot and continues to improve pretty significantly. I was a top 200 Master Open Qualifier on 2016 and 2017 and I’m usually on the podium of local competitions so my performance is really not bad…and I’m totally fat adapted. I follow sort of a TKD where I sometimes eat carbs at night during the week, but never above 100g so It doesn’t even kick me out of ketosis due to activity level. I’ve been playing with some measurements and I noticed that my BG reading after high intensity training sessions is really high (up to 180mg/dl). But it goes down fast (sometimes it goes down to 50mg/dl but I show no side effect of hypo, function completely normal). From my research, the high glucose post high intensity is normal and due to the stressful response of the exercise and also because my liver is producing the glucose from gluconeogeneses to provide it for the workouts, when needed. This only happens when the workouts are long, above 30 minutes.


I’ve been doing keto for a month now. Cheated on Sunday to hopefully reboot this diet because I’ve only lost 3lbs. I’ve been within my carbs and doing everything right. Somehow just not loosing weight. I’ve lost 50lbs before just eating healthier so I don’t understand why this isn’t working for me? If anyone has any advice it would be helpful, I’m trying to stick this out for my mom so she stays healthy but it suck not loosing. I’m 26 and 219lbs so I have plenty of fat to loose.
The notion that the Atkins Nutritional Approach - high in protein, which builds muscle, and fat, which is used for energy - will force your body to break down muscle is incorrect. Only individuals on very low-calorie diets can lose muscle mass, because they have an inadequate protein intake. Atkins, however, is not calorie restricted (this isn't an invitation for gorging, but a recommendation to eat until you are no longer hungry) and the high protein intake required offsets any possible loss of body mass.
Ultimately, cancer is highly complex, whereas some tumors may be highly responsive to carbohydrate restriction, others may become adapted to utilise fats or ketones. Cancer, and the treatments currently in use cause unpleasant systemic effects such as muscle wasting and compromise of the immune system, therefore any interventions should be undertaken under the guidance of a doctor. There are limited treatment options available for some types of cancer, many drugs have toxic side effects and many types of cancer have a poor prognosis. In these cases, considering metabolism as an adjunct to conventional treatments is interesting, and offers the potential of another avenue of attack on cancer.  

Same here, been low carb/keto fir almost 6 months, noticed energy levels increased. I started for medical reasons, I have brain cancer with seizures, I have not had any seizures at all since starting this. For me, if I don’t lose anymore (I have lost 25 lbs), and I could stand to lose about 25 more, but I am 64 and it’s harder lose those pounds, or I could be at my set point…


But low-carb diets don’t work because of how people seem to think they work — more specifically, through something called the “insulin hypothesis,” which says that removing carbohydrates from your diet stabilizes insulin and blood sugar levels, subsequently increasing your metabolism and reducing your hunger. This hypothesis has failed several studies. A review study published in the European Journal of Clinical Nutrition in 2017 reported it as “carefully controlled inpatient feeding studies whose results failed to support key [carbohydrate-insulin] model predictions.” Sad.
The second type of cellular fuel comes from fat and fat metabolism products called ketone bodies.   The average sized human body can store hundreds of thousands of calories in the form of fat, so we could say that this system of energy is almost unlimited, depending on how long one goes without food.  Eventually, it would get used up, but people have been known to fast for months and live through it.
All I can say is…Keto has been AMAZING for me and a lifesaver. Instated this journey at 240lbs. I’ve been obese for 20 years. My cholesterol was awful. Triglycerides were massively high. I was a walking heart attack. I’ve lost 40 lbs since January and 3 sizes,and a TON of inches. I’ve never felt better in my life. I have so much energy. At 51 I’m going to a local amusement park, walking ten miles and riding record breaking coasters. My cholesterol? My doctor is amazed on all levels. Hes applauding my bew health lifestyle. And I know literally thousands of people online and off line who’ve had thecssme success and some who have lived this way for more than ten years. Just because you didn’t like it doesn’t make it bad. And btw…its not a free for all. Macros depend on the person. My fat levels,aren’t nearly that high and once you reach ketosis you cut down on the fat. THAT is when fat burning starts and the fat burning absolutely happens.
Gut health is extremely important for anyone looking to lose weight and increase overall health[*][*]. It is not uncommon for those who shift to a ketogenic diet to have a change in the production of bacteria in their colon (although not necessarily a bad thing – just a change)[*]. To help support this change and increase the healthy bacteria in your gut, try consuming more fermented foods such as sauerkraut, kimchi or kefir and/or supplement with a high-quality probiotic[*][*].
×