"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.)

Regarding keto diets specifically, studies have proven this method to be more effective than moderate protein diets in lowering blood glucose, promoting weight loss and lowering HbA1c in patients with Type 2 diabetes. A growing number of clinicians now agree that low-carb diets can effectively treat this disease. The fact remains: these diets remain controversial and contradict dietary guidelines, so they are not very often discussed or recommended in the clinical setting.
Also recognizing what worked 6 months to 1 year ago may not work today. Our bodies change over time and we have to adapt to those changes. So many factors affect your blood glucose levels; you will face hormonal changes, stress related changes, and your pancreas may not be working as well today as it did a year ago and we wouldn’t expect it to. Just as the heart of an 18 year old person is much stronger than it will be at the age of 50 years of age, your pancreas’ function will decline with age with the normal aging process. Many of my patients throughout the years have came to me feeling so defeated because now they have to go on medication or insulin. They are so relieved to hear this may not be due to anything they have caused by overeating or weight gain, it may be just the unfortunate natural progression of diabetes. Until we discover cures for the different types of diabetes, this is what we face.
"Because cancer cells prefer to use glucose, diets that limit glucose may be beneficial," Barbara Gower, PhD, senior author and professor in the Department of Nutrition Sciences, told Healthline. "Because they limit glucose and several growth factors, ketogenic diets will limit the ability of cancer to grow, which gives the patient's immune system time to respond."
I lived the last 10 years with this disease and a mentality of “Well all those other people around me are eating and drinking this stuff, so I want to be normal like them” I’m lucky that mentality didnt kill me. I’ve had A1C of 12, bad cholestoral in the high 600s and triglycerides of almost 2000. And yes, the author is right, our lives are ridiculously built around food. That’s why we have an obesity epidemic in this country. I am the only person I know that eats healthy. Everywhere I went for the last 10 years I was surrounded by food and drink. Oh well. Moderation is only the key for people with good genes. For people like me, sacrifice is the key. I don’t want a normal life anymore. Excuse my vulgarity, but I want energy, six pack abs, and a hard dick again. This disease wrecked my life and I’m never going back there again.
It’s also common for people starting the diet to experience flu-like symptoms, such as headaches and fatigue. This side effect is so common that there’s a name for it: the keto flu. “You shed a ton of water weight at first, which can lead to dehydration,” Nisevich Bede explains. This can worsen the symptoms of the keto flu. To counter it, she recommends staying hydrated and loading up on electrolytes through electrolyte tablets.
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The bottom line? If you’re thinking about trying the ketogenic diet, run it by your doctor first — regardless of any preexisting health conditions. And consult a registered dietitian nutritionist (find one at EatRight.org) to find a nutrition professional who can work with you to create a meal plan you can stick to. People with kidney disease or a history of disordered eating should avoid the diet, and people with type 1 diabetes may want to avoid it, as well. If you have risk factors for heart disease, you’ll want to speak with your doctor before considering the diet.
In order for this process of fat breakdown to ‘work’, the protein content must be kept low enough to prevent gluconeogenesis. So, just because you are eating a low carbohydrate diet, does not mean you are in ketosis. It is important to note here, that this nutritional ketosis is different from ketoacidosis, which is the setting of low blood pH level that occurs in people with diabetes and can be very dangerous.
Good article. A friend at work is stating this diet and of course being new at it, he is quite the Zealot. I have been into nutrition and exercise for over 40 years (57 years old now). I have tried s few different eating philosophies (I never use the word the word diet. Negative connotation and dieting isn’t good the way most practice it.). Eating Keto style and the logic behind it aren’t too different than some others. And you pointed out many of the misconceptions about cholesterol and triglycerides ect. For about the last 20 plus years I have pretty much followed a “Zone” type diet. 40% carbs, 30% fat, 30% protein. And I always get weird looks at the 30% fat part. Well, I’m 57 with 7% body fat. Not bad for and old guy. I work out and I supplement with protein as I lift weights. It’s worked well. The ratios may be different, but the emphasis on vegetable carbs and good fats are the key to either way to eat. There were only a couple things that kinda struck me as something that made me go hmmmmm. Using the Inuit people isn’t a good example really. They have evolved some different physical features over hundreds of years than we have. And there is no evidence if ketosis occurring in examination. And somehow when you mention eating large amounts of animal fat, just hit me as counterintuitive. It’s a much different fat than an avocado. Finally, and this is just me, I love fruit. True it’s probably less efficient, but its good, sweet, and beats the hell outta donuts for your health. It fulfills the reward need many of us have. I also feel if God put it on the earth naturally, it’s got a place in our food source. I’ve had a philosophy about excersise that’s served me well. What’s the best exercise? The one that you’ll do regularly. Get up and move and find out what works for your own body. It applies to good too. If you feel deprived or for various reasons can’t stay on the supposed best food program, what good is it? But if you stay with more natural and Balanced foods that usually leads to more energy then more and regular excerise. Check in. It looks like it’s been 2 years since you wrote this. I’d live to hear how your doing.

Participants completed take-home food records (4 consecutive days, including a weekend) collected at baseline and at weeks 2, 8, and 16 during the study. Participants were given handouts with examples of how to complete the records. A registered dietician analyzed the food records using a nutrition software program (Food Processor SQL, ESHA Research, Inc., Salem, OR).
While people can argue back and forth about the role carbohydrates play in a healthy lifestyle, no one is going to say packaged snack foods are healthy. This is one of the areas where the ketogenic diet definitely succeeds because it eliminates the opportunity to eat highly processed foods, which are made almost entirely from sugar and other refined carbs. In a review published in the European Journal of Clinical Nutrition, the authors highlighted a number of studies showing a ketogenic diet can significantly improve insulin sensitivity for those with type 2 diabetes. They went so far as to say, “results have been nothing short of miraculous.”
I am a T2D, finally fully keto starting at the end of March. I am down 28 lbs. My goal is 50, so I am feeling encouraged and fitting into smaller sizes already. In May my A1C was 5.6. This morning, according to a home test kit I purchased from CVS, my A1C is 5. I believe that is fairly accurate based on my blood sugar readings, which are staying well below 100.
The side effects of extreme low-carb diets are still a mystery. "The first major drawback is the fact that we really don't have any long-term research about how keto followers fare 10, 20, 30 years down the line," Turoff says. "What will the results look like? Will they regain the weight? Will they suffer health consequences? We also thought smoking and diet pills were a good idea, until long-term studies showed us that we were wrong."
Your liver oxidizes fatty acids to produce three ketone bodies — β-hydroxybutyrate, acetoacetate and acetone — that provide an alternative to glucose to fuel your brain and other tissues. And most organs, including your brain, thrive on ketones. Increased ketone levels replace glucose as your primary energy source, reducing need for gluconeogenesis and sparing protein breakdown. (4)
Based on what we know from the available research, is the keto diet safe? The evidence is clear that the KD can reliably help to treat obesity and improve insulin resistance, but the long-term impact of the KD on cardiovascular risk factors, liver disease and glucose tolerance is more controversial. Experts agree that genetics seem to play a role in how different people respond to the KD, meaning some may be more likely to thrive on very low-carb diets, while others are more susceptible to developing side effects.

At the first visit, participants were instructed how to follow the LCKD as individuals or in small groups, with an initial goal of ≤20 g carbohydrate per day. Participants were taught the specific types and amounts of foods they could eat, as well as foods to avoid. Initially, participants were allowed unlimited amounts of meats, poultry, fish, shellfish, and eggs; 2 cups of salad vegetables per day; 1 cup of low-carbohydrate vegetables per day; 4 ounces of hard cheese; and limited amounts of cream, avocado, olives, and lemon juice. Fats and oils were not restricted except that intake of trans fats was to be minimized. Participants were provided a 3-page handout and a handbook [11] detailing these recommendations. Participants prepared or bought all of their own meals and snacks following these guidelines.


I must note here, that as a nutrition professional who has worked in pediatrics and seen children who must follow this diet, it is incredibly challenging for both the child and family. Most people who must follow this diet for therapeutic medical reasons have trouble actually reaching ketosis with diet alone, and need to drink poor-tasting formula drinks to keep their carb-to-fat ratio in tight control. Many of these individuals must follow this way of eating to survive or have any sort of quality of life.

Test ketones in the late morning or afternoon. Blood and urine ketones are usually lowest right after waking up. Try testing later on, preferably a few hours after eating. Even if you’re only in ketosis for a portion of the day, you’re still getting some benefits, as discussed in this talk by Dr. Steve Phinney: Achieving and maintaining nutritional ketosis.

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.
And it’s not just this study, either. Several other studies have found  that keto leaves rodents unable to process carbs,[7] leads to insulin resistance,[8] and, more long-term, causes non-alcoholic fatty liver disease, which is when your liver accumulates lots of fat and begins to shut down.[9][10] Triglycerides and inflammation go way up, too.[11]
Fats produce more energy as compared to proteins or carbohydrates and this quality of theirs renders them very helpful in ensuring that the body is sufficiently energized. Since your body is using up fat for providing energy for the whole reaction system, the fat content decreases over time. This happens since the fats are not in the adipose tissues now. Instead, they are being broken up as they are ingested. This further prevents obesity.

In 2013, researchers published a case study of two women with bipolar II who ate long-term ketogenic diets, one for two years and the other for three years. The authors reported that both “experienced mood stabilization that exceeded that achieved with medication; experienced a significant subjective improvement that was distinctly related to ketosis; and tolerated the diet well.” They noted, too, that “there were no significant adverse effects in either case” and that the two cases “demonstrate that the ketogenic diet is a potentially sustainable option for mood stabilization in type II bipolar illness.” .


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.
"Those with type 1 diabetes should avoid a ketogenic diet," warns Joseph Galati, MD, a hepatologist at the Liver Specialists of Texas in Houston, "Many patients with type 1 diabetes have some degree of renal impairment, and handling the build-up of ketones and acids in the body may cause too much stress on the kidneys. Of course, any pregnant women with diabetes, especially those requiring insulin should avoid such an extreme diet given the low glucose levels will be a constant [health] threat."

In a March 2018 blog post, Dr. Ede provides a range of very helpful tips for anyone already on mood-altering or psychiatric medications who want to try a ketogenic diet, such as how to talk with your psychiatrist or mental-health provider and what laboratory metabolic tests the doctor should order to help monitor your response to the diet. Most importantly, she provides details about some specific medications — notably specific antipsychotic medications, anticonvulsant medications, and lithium — that should be carefully monitored.
I am sorry you had this experience. I feel that this educator was not giving you good advice. All my women who want to lose weight are recommended to consume 30 grams of good carbohydrates at each meal, and 15 at each snack. If you were not trying to lose weight, I would have recommended 45. I find this is all it usually takes to begin to lose some weight as you start to get active. Patients set their own goals with motivational help from their Certified Diabetes Educator. Our intent is never to insult, and you should not have gone through that. It sounds that you have now found the right path. There are many CDEs who could help you, so see what tools and motivation others may offer. I wouldn’t let one bad apple spoil the whole bunch. Many CDEs are also diabetic.
Those issues can be part of what's known as the “keto flu,” Warren says. Other side effects of the keto diet, all of which are tied to carb withdrawal, can include lightheadedness, nausea, mental fog, cramps, and headaches, in addition to tiredness. Luckily, the keto flu doesn't usually last more than a week—which is coincidentally about when people start to see the number on the scale go down, says Warren.
“You can spend two hours in the gym but ruin it with a bad meal,” said Sowers. “Incorporating all the food groups in proportioned sizes throughout the day is the best way to not only lose weight, but to also control appetite. Restaurants are also making it easier to eat healthier with calorie counts on the menu. Now people are able to make mindful choices when they go out to eat.”

Starting in the 1970s, when the Atkin’s Diet book was first published, low-carb diets have caught the attention of many people trying to lose weight and improve their health. The ketogenic diet (KD), which is both very low in carbohydrates and also very high in fats, has become one of the most talked-about diets in the past several years. With its rise in popularity, it’s no surprise that the keto diet has recently been the focus of dozens of research studies.


Thank you for posting Julie Martin. Abbey, have you ever been forced to loose a significant amount of weight? It is unfair to minimize the challenges that come along with consistent weight loss over a long period of time. Please provide information about any diet that has high success statistics when it comes to significant weight loss. Julie I plan to join your Facebook group and would absolutely love to have someone with your positive outlook to support my weight loss challenges.
Unlike some restrictive eating plans, the ketogenic diet actually has some wiggle room. Authority Nutrition highlights four different variations, which allow varying proportions of fat, protein, and carbs. No matter which variation someone chooses, they can expect to eat a lot of meat, fish, eggs, dairy, and nuts. It’s time to take a closer look at some of the health benefits of the ketogenic diet.
"Because cancer cells prefer to use glucose, diets that limit glucose may be beneficial," Barbara Gower, PhD, senior author and professor in the Department of Nutrition Sciences, told Healthline. "Because they limit glucose and several growth factors, ketogenic diets will limit the ability of cancer to grow, which gives the patient's immune system time to respond."

In addition, recent papers within the last few years investigating the effect of ketogenic dieting on obesity conclude that it’s an extremely effective way to not only lose fat, but spare muscle loss while curbing many disorders related to obesity as well (many of which have been discussed above), including the set of symptoms and risk factors known as Metabolic Syndrome (i.e. abdominal obesity, diabetes, hypertension, and elevated cholesterol)


There are a number of different causes of acne, and one may be related to diet and blood sugar. Eating a diet high in processed and refined carbohydrates can alter gut bacteria and cause more dramatic blood sugar fluctuations, both of which can have an influence on skin health. Therefore, by decreasing carb intake, it's not a surprise that a ketogenic diet could reduce some cases of acne.
Jalali says people following the diet have the best chance of keeping the weight off if they stay on it long term. And that’s not always easy to accomplish. The weight may come back if you go back to your regular eating habits. And regaining weight may lead to other negative effects. “Chronic yo-yo dieting appears to increase abdominal fat accumulation and diabetes risk,” notes Clark.
Kidney stones are usually a sign of excess oxalates in the diet and/or Vitamin K2 deficiency. If the kids were eating a no-vegetable diet where were the oxalates coming from? If they were eating the vegetables why the constipation and dysbiosis? What were they not eating that caused a K2 deficiency? You don’t have to be on a keto diet to have kidney stones as I know only too well.

In the last 15 years, about two dozen studies have been conducted on low-carb diets and all of the studies came out with one conclusion – the Ketogenic diet works! It is a much healthier and more effective option for weight loss compared with any high-carb calorie restricted diet. This article explores the numerous health benefits of ketogenic diet in addition to weight loss.

You’re transitioning. Your body is equipped to process a high intake of carbs and a lower intake of fat. Your body needs to create enzymes to be able to do this. In the transitional period, the brain may run low on energy which can lead to grogginess, nausea, and headaches. If you’re having a large problem with this, you can choose to reduce carb intake gradually.


There are so many tricks, shortcuts, and gimmicks out there on achieving optimal ketosis – I’d suggest you don’t bother with any of that. Optimal ketosis can be accomplished through dietary nutrition alone (aka just eating food). You shouldn’t need a magic pill to do it. Just stay strict, remain vigilant, and be focused on recording what you eat (to make sure your carb and protein intake are correct).


I started the ketogenic diet because I am a diabetic and refuse to take the medications that Drs advise because I’ve had bad reactions to them. I have lost about 20 pounds and the blood glucose is better controlled. I am also sleeping well most of the time. I did have the diarrhea but that has worked itself out. The one problem I am having is low blood pressure. I awoke dizzy one night and decided to check it and it was 73/48. I add himalayan sea salt to the water as recommended but sometimes still have a problem. A friend recommended using cream of tartar but what I have read said that it lowers blood pressure. Would I have to worry about low blood pressure if I added this to my water???
Every reduced-calorie diet is catabolic, meaning the diet can cause you to lose muscle. 'This is largely due to the fact that you are consuming less energy, so your body relies on other tissue (i.e., protein) to serve as an energy source. Added to that, some dieters do copious amounts of aerobic exercise when dieting, which can cause further breakdown of muscle. The brain can also call on protein to create more glucose for energy needs—a process called gluconeogenesis.
Also, diabetics should not undertake the diet without medical supervision. “Trying a ketogenic diet has the power to drastically and quickly lower blood glucose levels,” says Santos-Prowse. “If a person with diabetes is taking blood glucose-lowering medications, their doctor needs to be on board to help with adjusting or stopping the medications as needed.”
There are various ways to practice intermittent fasting on keto, including some that are less likely to trigger side effects like fatigue or cravings. Crescendo fasting gives you a break from fasting throughout your week, but is still very helpful for achieving the benefits of IMF. Dr. Cabeca and other experts, such as Amy Shah, M.D., advise their patients to check their urinary ketone levels (using ketone strips) and to aim for testing positively for ketones about three days per week.
In the study, the researchers fed mice a ketogenic diet for several days and expected to find a favorable outcome — perhaps weight loss or another indication of improved health. Instead, they found that the liver began resisting insulin almost immediately and the mice were unable to regulate their blood sugar levels after only three days on the diet. (Insulin resistance, meaning that cells in the body don't respond to insulin, is a key characteristic of type 2 diabetes.)
My son started the Keto Diet (not perfectly) with the ok of his Dr and a Different Oral Chemo at the same time. Last Tuesday an MRI indicated no new growth or no new tumors. We don’t know if the new Chemo, Keto diet, lots of prays or what has stopped the tumors from growing.I found your site after looking for possible adverse reactions to Keto Diets, and appreciate your research. His platelets are low now and never have been low before. This is stopping the next Chemo treatment. I understand that being on Chemo for 12 months could have created the low platelets and now the possibility that the Keto Diet could also be causing low platelets is frustrating. They will do a new blood test Tuesday to see if the platelets have increased. Any suggestions about how if possible to increase the platelets on the Keto Diet would be helpful.
Thank you so much for this article! My husband and I have been following keto for a little over a month now and we love it! I did a lot of research before starting, and am still doing lots of research because I like to be armed with the best information I can have when friends question my choices. Just yesterday I had a friend tell me that our brains need carbs to function (more than what we get from veggies). I hadn’t heard that before so I didn’t know what to answer. Thanks to your article now I know, and I have lots more answers in case more points come up. 😉
Let me introduce myself. My name is Mark Sisson. I’m 63 years young. I live and work in Malibu, California. In a past life I was a professional marathoner and triathlete. Now my life goal is to help 100 million people get healthy. I started this blog in 2006 to empower people to take full responsibility for their own health and enjoyment of life by investigating, discussing, and critically rethinking everything we’ve assumed to be true about health and wellness...
Often caused by lymph node removal or damage due to cancer treatment, lymphedema occurs because there’s a blockage in the lymphatic system and results in the swelling in leg or arm. A 2017 study involved patients who suffered from obesity and lymphedema and who embarked on a 18-week ketogenic diet. Weight and limb volume was significantly reduced. (5)
The diet is called "keto" in reference to the ketogenic state your body enters when it gets essentially no carbs — its default form of fuel for energy — and instead, uses fat as its source of energy. If you think about it, that's a pretty dramatic shift for your body to make. So it shouldn't come as a surprise that aside from hastened weight loss, keto can bring with it some significant complications.
Research shows there is a weak relationship between levels of dietary cholesterol and blood cholesterol.6 The effect isn’t the same for everyone either. There are “responders” and “non-responders” to dietary cholesterol; some people experience higher fluctuations in blood cholesterol levels according to the amount of cholesterol they eat, while others are more stable regardless of diet.
With the high intake of fat, are we concerned about the high intake of cholesterol? YEP. A study using the keto diet as a form of treatment for epileptic seizures in children found that after 6 months of administering the diet, triglyceride levels increased, total cholesterol levels increased, and HDL and LDL increased. These results suggest that over time, a keto diet may lead to an increased risk of hypercholesterolemia and hypertriglyceridemia. In the same ten-year study, 40% of patients developed hypertriglyceridemia and 29% of patients experienced hypercholesterolemia. So, if heart disease runs in your family, you may want to bow out now.
I totally appreciate your article. My son-in-law was just telling me a friend of his who is a bodybuilder told him that staying in ketosis for more than 4 months at a time will cause muscle atrophy in your body to eat its muscles. Well of course this concerned me, so running through the internet I ran across your article. I’m really glad to see these 10 myths that you’ve dispelled. I feel much more confident and comfortable staying in ketosis. Thank you.
If a person does not like his or her body, he or she will not be able to have the same amount of confidence as someone who loves their body. It is very important to be confident for a person to do well in his life. Without confidence, no one really takes you seriously and you are unable to impress anyone or show your talents to the world. To make this happen, this formula increases confidence in the user so that they can be more inspired from their own bodies rather than others.

You may need more water. Going keto causes an initial reduction in fluid retention in cells throughout your body. Your digestive tract requires water to keep the fecal matter soft and moist. As you aspire to consume more fluid, be sure to add a pinch of salt to each cup of water you drink, and to sip steadily throughout the day instead of binge chugging. These measures will help you better absorb additional fluids instead of excrete them.

Since the state of ketosis forces cells to rely on ketones and to use the mitochondria for energy, ketosis feeds healthy cells while starving cancer cells. This especially seems to be true against some of the most deadly and incurable cancers. Researchers like Dr. Dom D’Agostino are also researching the role of ketosis and fasting in improving the outcomes and reducing the side effects of existing cancer treatments.

Thanks for reading Roxanne! You could try the following: eating more frequently, using MCT oils, consuming plenty of salts, and potentially using an HPA axis supporting formula such as adapt-strong: https://store.drjockers.com/products/adapt-strong we also have an awesome magnesium lotion with melatonin that could be helpful in this case: https://store.drjockers.com/products/magnesium-lotion-goodnight-with-melatonin


Chelsea is the site editor and nutritionist for Ultimate Paleo Guide and Paleo Meal Plans. In 2016, Chelsea graduated from the National University of Natural Medicine with a Master’s degree in Nutrition. When she’s not working for Ultimate Paleo Guide or coaching CrossFit, Chelsea enjoys hiking, traveling, cooking, and eating. You can keep up with her on Instagram at @chelsbrinegar and LinkedIn.
One way to find out if the keto diet is not be ideal for your cardiovascular health is by checking if your total-to-HDL cholesterol ratio is above 4 and/or your LDL-P remains high or increases after starting the keto diet. If this is the case for you, then you may fare better with a low to moderate fat diet with plenty of whole foods, fiber, monounsaturated fats, polyunsaturated fats (especially omega 3s), and limited saturated fats.
Longer-term studies conducted on animals have shown the KD may be associated with some adverse events. For example, in rodent studies, some will develop nonalcoholic fatty liver disease (defined as liver damage that is not due to excess consumption of alcohol, viral or autoimmune causes, and iron overload ) and insulin resistance when put on the keto diet long-term. Other studies suggest that some individuals may be predisposed to heart-related problems if they eat a very high-fat diet for an extended period of time.
Although the ketogenic diet has been a source of controversy and debate, one cannot dispute its astounding health benefits. Initially, it was created by specialists at John Hopkins Medical Center, particularly for individuals who have epilepsy. The researchers established that fasting enhanced the number of seizures the patients experienced. Nonetheless, since fasting isn’t an accomplishable purpose nowadays, a diet has been developed that would trick the body into believing it was in that process.
Ketosis, similarly to fasting or caloric restriction, turns on a group of genes called Sirtuins. When scientists activate Sirtuins in animals, they found that these animals live longer. In addition, Sirtuins can help keep you lean and energetic during the day and sleeping well at night. More research is needed to know if this effect is the same in humans, but evidence seems strong that spending some time in ketosis is beneficial.
A huge concern with the keto diet is the maintenance and potential loss of muscle mass. Many people will just think: hey, dummy, then just eat more protein. However, some research has shown that even if your protein intake remains constant, a low carb diet may promote muscle loss. A study from the Netherlands confirmed these findings. In the study, participants were given three diets (high carb, moderate carb, low carb) and moderate protein. The study found that those following a low carb diet experienced increased muscle breakdown. This is because when we eat carbohydrates, we produce insulin which promotes muscle growth. This is why athletes depend on carbohydrates (along with protein) to fuel their performance. When we eat carbs, the insulin release “unlocks” our muscles to let the protein in so it can do its job at building our muscles. So, when we skip the carbs all together, muscle glycogen stores get depleted, we lose out on those muscle building opportunities. Forget about high intensity training. A depleted glycogen store also means our workouts will suffer because we just don’t have enough oil left in the tank. This was a again suggested in the recent review looking at many ketogenic studies. The studies found that there was greater lean body mass loss in the ketogenic groups compared to the other diets being studied.
The high-fat, very low-carb keto diet lets you enjoy lots of avocado, butter, bacon and cream—but requires cutting way back on added sugars, most processed foods, sweets, grains, and starchy veggies (whew). The eating plan is mega-popular among Hollywood A-listers (including Halle Berry, Megan Fox, and Gwyneth Paltrow); but if you don’t have a private chef who can futz with fats to make delicious meals and snacks, the carb-restricted lifestyle can be extremely challenging to follow. 
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