After the depletion phase, your body will enter a survival mode where it starts to signal the liver to produce ketones from available dietary fat sources and body fat stores. These ketones will replace glycogen as the body’s fuel source in the absence of glycogen. The body will go back to burning glycogen for energy when you start eating carbs again.
I have been diagnosed twice with post prandial reactive hypoglecemia since 37 years old ( now 70). Obviously my insulin levels shoot high and then blood sugar drops to 2.2. Can you give me any special advice on the Keto diet with regard to this. I have been diagnosed just recently with lipodema. I have been following diet for 3 weeks and my brain is already alot clearer.
The majority of scientists believe the exact opposite. They believe that it was our high fat content in our foods in the caveman days that caused the evolution of man intellectually. The human brain seems to thrive on fat, which might explain Keto’s potential when it comes to neurological impairments like epilepsy, and now studies are being done on patients with autism, and alzheimers. One of the most common side effects people seem to claim to experience is mental clarity and improved focus.
It is important to understand that the statement that carbohydrates are “nonessential” is not only factually inaccurate, it results in adopting a low-carbohydrate diet or ketogenic diet that increases your risk for a wide variety of chronic health conditions that may ultimately shorten lifespan, decrease your quality of life, and accelerate your risk for chronic disease.
The Ketogenic Diet is a low carbohydrate diet, consisting initially of less than 20 carbohydrates per day. Not per meal, yes, you heard me correctly, per day. It is not for the faint of heart and yes I am writing from experience. Of course I have tried it! Hasn’t everybody in America at some point who has wanted to lose weight? Does it work you ask? Of course it does! The problem is how long can you keep it up?
Dr. Campos, it is unfortunate that you retain the medical community’s negative stance on the ketogenic diet, probably picked up in medical school when you studied ketoacidosis, in the midst of an obesity and type II diabetes epidemic that is growing every year, especially among populations who will never see the Harvard Health Letter. The medical community has failed in reversing this trend, especially among children, and the public is picking up the tab, in the form of higher health insurance premiums to treat chronic metabolic diseases which doctors cannot cure. The ketogenic diet does not bid its adherents to eat unhealthy processed meats, and the green leafy vegetables that it emphasizes are important in a number of nutritional deficiencies. People lose weight on the ketogenic diet, they lose their craving for sugar, they feel more satiety, they may become less depressed, their insulin receptors sensitivity is improved, and these are all the good outcomes you fail to mention. There is a growing body of research which demonstrates the neuroprotective effects of the ketogenic diet to slow cancer progression, as well as diseases like Parkinson’s and Alzheimer’s, for which there are no effective medical treatments. Please respect your patients by providing them with evidence-based medical outcomes, not opinions.
Another thing we know about diets and weight loss is that the results are not easily maintained. I’ve written about this in depth with regards to the participants on the Biggest Loser. This was evident in a study analyzing 31 long term studies on dieting, which found 2/3 of dieters put back the weight they lost. Other research has reported the failure rate may be as high as 95%. This isn’t specific to the keto diet but rather, any diet that is restrictive and unrealistic may be nearly impossible to sustain.
“Your liver produces ketones all the time, but the rate depends on carbohydrate and protein intake,” says Jeff Volek, Ph.D., R.D., a professor of human sciences at Ohio State University. When the majority of your diet is made up of of carbs and protein, ketogenesis slows. Replacing carbs and protein with fat will put your body into ketosis, thus ramping up ketone production. This takes about three days to induce.
Ok. I have MCT oil. It’s day six. I got a metallic taste in my mouth last night (day 5), and have had 2 hypoglycemia attacks over night (took small amount of OJ and some 2 tbsp of flaxseed meal with half & half). Slowly felt better throughout the day. Bought just about all the adrenal support products you recommend this a.m. My main issue since last night: my heart has been pounding, non stop. I read it might be cortisol induced reflexive hypoglycemia or something? I’ve never been diagnosed with adrenal exhaustion, but I am noticing tiredness and weight gain (I’m 47). So, the adrenal exhaustion perhaps is self diagnosed (I’m know, so annoying for a physician to hear! I hate saying it myself). But, I’m wondering, if I’m just perimenopausal instead, should I continue on keto? If so, will the heart pounding resolve after a certain time? (Days? Weeks?) Plesse excuse how long this is. Just trying to anticipate questions.
Great article Doc! Question: One of the world top experts in high fat low carb diet, Dr Tim Noakes has stated that top level athletes actually perform better on keto, as himself an extreme marathoner , cured his type 2 diabetes by going keto. In the light of what we know today about keto, would you still assert that athletes shouldn’t adopt ketosis as their desired state?
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Controls glucose and reduces diabetic symptoms. In a randomized study of overweight adults with type 2 diabetes, the participants were divided into two groups. The first group followed a 32-week ketogenic diet program while the second group followed the conventional low-fat, diabetes diet plan. At the end of the study, the ketogenic diet group improved their glycemic control and lost more weight than the other group. The research showed that the ketogenic diet improved the participants’ blood glucose levels while also reducing the need for insulin.
The comments defending the keto diet suggest that the individuals are successfully using the keto diet to help them maintain a healthy weight and a healthier A1C level. The individuals also suggest that they view it as a way of life rather than a diet. This is good news for many of us who are facing the question of whether it will be helpful and necessary to reduce carbohydrate intake to keto producing levels in order to halt or reverse the onset of type II diabetes. I think like those individuals, Tami is speaking from her own personal experience where she had success losing weight, but had difficulty maintaining the keto diet long-term. I am sure that though you have been successful, you can understand that there are many who might find it difficult to maintain. I too have been given very bad guidance by Medical Doctors who lean on old Med School information to practice medicine rather than continuing to broaden their knowledge base and learn more about nutrition. I cannot get back the 20+ years of suffering with a debilitating disease that could have been cured because my doctors were not well informed or willing to listen to information that disagreed with their limited knowledge base. Those years are gone and the destruction to my body is not reversible. So I understand the anger you feel toward a system that isn’t working in the best interest of the patient. But I think that expressing anger toward those who disagree with our personal experience, is not solving the problem. Hopefully we can change the ADA guidelines by respectfully urging them to reconsider their position based on the sheer volume of the comments they receive from successful people like you, who are living the keto diet lifestyle and living better. I commend you for becoming your own best health advocates. Thanks for your encouragement and your passion. And thanks to Tami as well for sharing her personal experience and the information she had collected. We all have to be true to what we believe and we all have a right to come to our own conclusions. It is good to know that there are success stories out there. I wish you all good health and continued success. I also hope that one day medical training will do a much better job of preparing doctors to become their patient’s best advocates, actively learning and searching for cures rather than treating symptoms in ways that cause even more disease to develop. The system is failing so many of us.
Earlier this year Seattle family doctor Dr. Ted Naiman, who has been helping patients with low-carb or ketogenic diets for 20 years, described how his own obsessive compulsive disorder was resolved almost instantly — never returning — on a low-carb high-fat diet. Naiman over the years has seen dramatic mental health improvements in his patients who adopt low carb ketogenic diet. “Definitely bipolar, depression, anxiety, OCD, are all much, much better on a low-carb diet,” he says.
Plus, "some research has found that athletes on a keto diet become less efficient in their exercise," Brown says. Because of this, the researchers involved in the study recommended that instead of going for a keto diet, athletes who want to take advantage of their body's ability to use fat as fuel alternate between training in a carb-depleted state (for example, doing a fasted workout in the morning after not eating carbs the night before) and eating carbs as normal. (Related: 8 Things You Need to Know About Exercising on The Keto Diet)
Note: Are you a vegetarian or vegan and want to go on a ketogenic diet? It’s still possible! Just keep in mind that the dietary restrictions can sometimes be a little bit intense. Make sure to plan ahead and prepare to aid your success. To help out, we’ve published articles (with 7 day meal plans included) for both the vegetarian ketogenic diet and the vegan ketogenic diet.
Diets that focus on lowering carbohydrates and increasing fat have been associated with lower levels of “bad” cholesterol and higher levels of “good” cholesterol. Furthermore, lower triglyceride levels are typically seen in those on a ketogenic diet. A better cholesterol balance and fewer triglycerides can help to protect against plaque deposition in the arteries, which can lower your risk of atherosclerosis, heart disease, heart attacks, and stroke.
It's important to note that the drop-out rate was substantial and reports of symptomatic hypoglycemia 1-5 episodes) were experienced by 69% of those in the study. The mean carbohydrate intake was 35 grams (+/- 15) daily. Based on self-reported results, the change in HbA1c was -1.45% (+/- 1.04, P < 0.001) with an average HbA1c of 7.2% associated with greater hypoglycemia; yet, these results are comparable to other study findings. The average blood glucose levels were 104 mg/dL (+/- 16). 2 Final lipid profiles were mixed. The results were similar for adults and children.
You are so biased against Keto, this can be noticed very quickly because almost every positive thing you say about Keto, you immediately follow with a “but…” negative statement. And most of your negatives are simply saying it’s hard to maintain. You completely exaggerate the negatives “If you have one bad day and your body is kicked out of Ketosis, you immediately gain all of your weight back”. That is simply not true; if someone is on a Keto diet for 3 months, they will not gain that weight back in a day. Also, their body will be back into Ketosis the next morning. You say that the ADA doesn’t recommend 60-70 grams per meal, but it does (coincidentally I just left their website before coming here). I don’t claim to be a Diabetes expert; I admit that. But your bias is leaning heavily against Keto. “Moderation” is not your goal if you have diabetes. When you compare HbA1C levels, for example, you compare them with someone in Keto at less than 20 g of Carbs per day as compared to someone at a 70-90 gram of carbs per day diet. You should be fair and compare them with someone on a 200 g of Carbs diet. If you want to get rid of the effects of Diabetes, get on a Keto Diet, period. It MAY get rid of the effects completely, but in the very least it WILL reduce your Insulin needs to very low and you’ll have little-to-no side effects other than a relatively restrictive diet (most diets are WAY more restrictive than Keto). You back up everything with “science” and misleading numbers/arguments without providing any real evidence.
To lower your heart risks while following a keto diet, be mindful of the types of fats you’re eating. “Most nutritionists encourage people to get their fat from heart-healthy mono- and polyunsaturated fats,” Urbanski says. So even though going keto may sound like a license to load up on bacon and butter, reach for unsaturated fats from foods such as olives, nuts, seeds, and avocados, and olive, canola, and nut oils.
Additionally, people with gallbladder disease, pancreatic insufficiency, a history of kidney stones, or a history of anorexia should talk with their doctor regarding the safety of a ketogenic diet program. Last, women who are pregnant or breastfeeding require higher protein intake and should adjust the ketogenic diet plan to meet this macronutrient need.
The typical American consumes about 52% of calories from carbs, 33% from fat, and 16% from protein, according to a study published in The American Journal of Clinical Nutrition. This macronutrient breakdown is fairly close to current dietary recommendations from the United States Department of Agriculture, which recommend 55 to 60% complex carbs, 30 percent fat and 15% protein to help prevent cardiovascular disease.
You increase your production of these ketones through a process called ketosis. To get and stay in ketosis, you increase your dietary fat intake while modifying protein and dramatically limiting carbohydrate consumption, and you incorporate intermittent fasting. Human adults have little need for dietary carbohydrates, and reducing intake to shift into mild ketosis can provide dramatic benefits. (5)
In the brain, there are some parts that can only take glucose to burn for fuel, which is usually derived from carbohydrates. However, when the body is on a ketogenic diet, the body will enter ketosis, which is a process that produces proteins called ketones from fatty acids in the liver. The brain can surprisingly also take in these special ketones to function. Past studies have shown that children affected with epilepsy who are on this diet have a 50% lower chance of reducing seizures. 16% of that group have also shown to be seizure free. This diet is for individuals with Parkinson’s disease and Alzheimer’s to see if ketogenic diets can also help.
The keto diet restricts carbs so much that anyone who is on blood sugar lower medication or who has type 1 or type 2 diabetes must consult his or her doctor before making such a severe dietary change. As the body adapts to low-carb dieting, medication dosages and treatment plans will have to be revised, and blood sugar levels must be carefully monitored.
Unfortunately, there’s no long-term data on ketogenic diets versus other diets. In a 2015 Italian study, those on a ketosis diet lost 26 pounds in three months. About half of the participants stayed on the diet for a year but lost little additional weight in the next nine months. People in a 2014 Spanish study who followed a very-low-calorie ketogenic diet lost an average of 44 pounds in a year—but a third of them dropped out, possibly because it was too hard to maintain.
Those with mental health conditions have higher rates of physical illness and premature mortality, with life spans shortened by 13 to 30 years. People with mental health conditions also have higher rates and worse outcomes for chronic conditions such as diabetes, cardiovascular disease, and cancer. Years lived with disability for mental and substance use disorders increased 45% from 1990 to 2013 worldwide – during the same time that the incidence of obesity and the diabetes exploded.
“Keto diets should only be used under clinical supervision and only for brief periods,” Francine Blinten, R.D., a certified clinical nutritionist and public health consultant in Old Greenwich, Connecticut, told Healthline. “They have worked successfully on some cancer patients in conjunction with chemotherapy to shrink tumors and to reduce seizures among people suffering from epilepsy.”
I actually went on a ketogenic diet last year to see if it would help my migraines. I have a history of chronic migraines which would usually last 3 days, sometimes longer. Triptans help a lot but I don’t like having to take them. I stayed in ketosis for about 8 months and experienced a significant reduction in migraines, from feeling some type of headache (mild o r severe) almost everyday to 1 or 2x per month while in ketosis. Although I’m very healthy otherwise, I do think my migraines may have something to do with blood sugar fluctuations (despite previously eating a whole foods diet and no refined carbs), and keto totally stabilized this. I eventually came off of Keto because I’m not really a meat lover. When I came off, but remained low carb, my migraines stayed under control for the most part. When I increase carbs, they do return.
The aim is far broader than suggested by the article here: It’s not just about what you put in your mouth – it’s also about timing and exercise. There are three ways to be in ketosis – which simply means that “fat burning” and not being dependent on sugars. Fasting puts a man into ketosis in 3 days and a woman by 2 days. Endurance exercise gets you there in a couple of hours. Eating a high fat diet will do it too. The goal however is hidden by the detail – it is to acquire a “Flexible Metabolism”. The aim is to switch on the full fat burning capacity and keep it running – which takes from between 4 to 12 weeks physical adaptation (for the muscles to fully be able to use ketones). The heart runs approximately 27% more efficiently on ketones than on glucose! The brain works better too – Alzheimer’s being referred to by researchers as “diabetes 3”. Once you have a Flexible Metabolism you can consume carbs during or after exercise without dropping out of ketosis – though this depends on your own bio-individuality. I can eat quite a lot of carbs – without losing ketosis – my partner cannot.
The key of these miraculous healing effects relies on the fact that fat metabolism and its generation of ketone bodies (beta-hydroxybutyrate and acetoacetate) by the liver can only occur within the mitochondrion, leaving chemicals within the cell but outside the mitochondria readily available to stimulate powerful anti-inflammatory antioxidants. The status of our mitochondria is the ultimate key for optimal health and while it is true that some of us might need extra support in the form of nutritional supplementation to heal these much needed energy factories, the diet still remains the ultimate key for a proper balance.”
The ketogenic diet has recently been investigated a great deal for how it may help prevent or even treat certain cancers. One study found that the ketogenic diet may be a suitable complementary treatment to chemotherapy and radiation in people with cancer. This is due to the fact that it would cause more oxidative stress in cancer cells than in normal cells.
If you’re wondering why iron is at risk on a meat-based diet, hear me out. Many grain foods provide a considerable amount of iron, because wholegrains naturally contain iron in their inner layer called the ‘germ’. Another reason is that some grain products can have iron added to them during manufacturing. So, once you cut grains out, your iron status could suffer, which can lead to unpleasant symptoms like tiredness and lethargy. It can even compromise your immune system.
"The diet was introduced in the 1920s as a way to treat epilepsy and then sort of fell out of popularity with the introduction of anti-seizure drugs," Turoff says. What's more, ketosis (the goal of keto, a state where the body uses fat for energy instead of carbs) is something seen in people during periods of starvation—including in people with anorexia nervosa. "The body is deprived of carbohydrates and thus has to turn to ketone bodies as a fuel source," Turoff explains. "People really need to understand that it's not just a low-carbohydrate, high-fat diet—it actually changes the way your body uses fuel."
That’s why the Bulletproof Diet uses cyclical nutritional ketosis, and why on days when I eat carbohydrates, I always have Brain Octane Oil so my cells have a steady supply of ketones. This builds metabolic flexibility: you can eat fat and carbs and your body will use them both, which is the goal. You want to be resilient and full of energy no matter what, and that means you want cells strong enough to burn whatever you give them.
There is one precaution with keto and children who are under their ideal weight, though, and you will need to decide if the risks outweigh the benefits – being in ketosis is a natural appetite suppressant. This will vary from person to person for how much this affects them, but if your child seems even affected by this appetite suppressant property, you may find that the GAPS or SCD diets are a better fit for healing the gut and encouraging weight gain.
Constipation is a common side effect of low-carb eating plans, including the ketogenic diet. Severely curbing your carb intake means saying goodbye to high-fiber foods like whole grains, beans, and a large proportion of fruits and vegetables, says Ginger Hultin, MS, RDN, Seattle-based nutritionist and spokesperson for the Academy of Nutrition and Dietetics.
I’m desperate to find some answers~I have no history of sensitivity to anything, no allergies. I understand allergies can happen at any time. I started the Keto diet and in a one month time I had four separate episodes of my tongue swelling~each episode worse than the one before. I LOVED this diet~felt great, handled it with ease. The last episode almost put me in the hospital~my tongue was so swollen it was coming out of my mouth making it difficult to swollen and breath. I had no choice but to narrow it down to Ketosis. All the foods were the same that I have eaten all my life. No new meds. The last episode I took 2 Benadryl and pulled myself out of Ketosis with consuming a Dr.Pepper, and 2 pieces of white toast. I was terrified. Everyone on Facebook in all these Keto sites tell me it has nothing to do with Ketosis….but I’ve tried literally everything I consumed when a was on that WOE and I’ve had no reaction in days. My body feels horrible, I have no energy, my entire body aches. I want back on the Keto diet because my body was responding really well to it~except for my tongue.
Anecdotally speaking, people do lose weight on the keto diet. Heather Wharton, a 35-year-old business relationship manager from Tampa, Florida, lost 140 pounds since starting the keto diet in January 2016: “I plan on being on the keto diet for the rest of my life,” says Wharton. “My husband and I consider ourselves to be food addicts, and the keto diet is what we use as a form of abstinence from trigger foods that have sugar and other carbohydrates." A typical day of eating for Wharton includes coffee with a protein supplement, a cup of unsweetened cashew milk, cauliflower rice with ground turkey and liquid aminos (a carb-free substitute for soy sauce), spinach, six slices of turkey bacon, six eggs, and a little salsa.
"On a ketogenic diet, your intake of fruits and vegetables is extremely limited, and we all know how important the fiber, vitamins, minerals, and other compounds in fruits and veggies are," says Libby Parker, R.D., a dietitian who specializes in treatment and prevention of eating disorders. It's true: There are a lot of healthy but high-carb foods you can't eat on the ketogenic diet. That's one of the reasons keto is usually pretty low in fiber, which isn't so great long-term. "Fiber is not only protective against many gastrointestinal cancers, it is also a big factor in fullness and weight loss," Parker explains. "Furthermore, constipation is very common on low-fiber diets like the keto diet." (That said, These Healthy, High-Fat Foods Can Help You Feel Full Longer.)