A. When you first start a ketogenic diet, you may temporarily experience flu-like symptoms such as dizziness, brain fog, irritability, stomach trouble, insomnia, and more, as your body switches from burning glucose to burning fat. These symptoms can occur for a few days up to a few weeks and are a natural reaction that you’re encouraged to push through. You can alleviate symptoms by increasing hydration, electrolytes, and natural salt consumption. Get lots of rest and exercise gently. Lastly, consuming activated charcoal binds any toxins stored in the fat you’re shedding and can reduce nasty detox symptoms.

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My favorite drink is: 1/3 glass of Spicy Low Sodium V8 + 1/3 water + 1/3 DIET Tonic Water + 1 rounded tsp Stevia. Outstanding !! After I plateaued out after 35 lb loss on keto I continued to drink this and had no difficulties losing 9 additional lbs. I simply do not believe the keto prohibitions on ANY sweeteners…. they have zero carbs & calories. Exactly HOW could they effect metabolism? IMHO THEY DON’T! I don’t believe that superstition, it’s biblical.
All I know is that by cutting out foods like bread, that have arguably no nutritional value whatsoever, I’ve lost fat weight and have been able to retain (and grow) muscle through workouts. Not only that, but I am markedly stronger, and I don’t suffer any effects of malnutrition. I don’t want to be one of these people that despite eating a “balanced diet” simply gets fatter as they get older, because of how carbs screw up your insulin resistance levels and cause your body to store fat (particularly visceral fat in men) where it isn’t needed.

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Thanks for the info. Still so CONFUUUUSSED. There is so much info on both sides that sounds perfectly logical (and I am a total sucker for a logical argument.) I remember the not so delicious food change when my parents needed to cut out salt and other stuff for high blood pressure and cholesterol which is now totally wrong. The food pyramid, which is now totally wrong. I’ve been on diets before – Weight Watchers – lost weight (very very very slowly) but felt like I was starving ALL THE TIME; Carb Limiting – lost nothing; No processed foods – lost nothing; Counting calories and food journals – seriously, if you have a job who has time for that; Keto – losing about 2 lbs a week, but think I’d rather just fast than eat this food combo so this is probably not sustainable for me. Isn’t there just a logical, healthy way of eating that requires no counting, no weird food, no avocados (well that’s just me – I think they’re gross), that does all that good stuff like no inflammation, good gut biome, etc. and I can lose weight without feeling so hungry?
Thank you SO much for your blog post. My niece went into Ketoacidosis recently and I compared it to what a former RN in my neighborhood has been doing & recommending to everyone (& they believe her because she used to be a nurse, but definitely NOT a Dietitian). Anyway, after reading, I learned they are completely different, however if a healthy person does test for ketones in their blood, what are acceptable levels? (This same nurse tests for ketone levels). I appreciate how much work you put into this write-up and honest feedback! (I work with 2 RDs who agree with you!) 

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Louella you are absolutely wrong. It’s actually funny to me that this dietitian talks about the keto diet to such an extent but neither you nor her ever mention Gluconeogenesis. Yes your brain has specific areas that can only use glucose, but the human body is a wonderful thing and can use a few different substrates to synthesize glucose without you ever having to eat it yourself. Look up Gluconeogenesis. Your body has the ability to convert the amino acids you find in protein into usable glucose for your brain. The fact that you don’t know this shows me how uneducated you are about the ketogenic diet in general. Perhaps you should read up on the subject before you start trying to sound like a scientist who clearly has no idea what she is talking about. Thanks.
Such a thorough article. Thank you! I have a friend who swears by the KETO diet. However, I’m of the same thinking as you are, that cutting out or eating next to nil of any food group, is not what God meant. Discipline in portion size, and perhaps not combining certain food groups (proteins with heavy carbs is a not best for our digestive system), but both can be eaten when not combined, hence no cutting out of any food group. Thanks again!
Truly Dr. Colbert is also a reputable source for more thorough science and modification of previous Keto extremes. The statements about Keto diets with dairy everyday are not true…I am a 66 year old professional (University trained) and have found medical people often very unknowledgable or partially knowledgeable which may be worse. I ask you Abbey to dig deeper…meet Dr. Colbert-not a quack and more in depth than your overview. Personally I am finding switch to more green’s and low glycemic vegetables and fruits with healthy fats, occasional dairy and healthy protein; a way of life that is helping our whole family. Please watch The Magic Pill…the help for family’s caught in old thinking from poor science (ie. Alex Keys) and with autism etc. and so much modern disease is in itself, motivation to search out more truth.
“These diets are so unsustainable and in the long term, just not worth it!” Most definitely in your opinion. I did a LOT of research on Keto before I started it in 2009. I lost 130lbs. It’s not a diet, it’s changing the way you think about food and fuel for your body. And once you do that you understand food freedom. I eat mostly Keto but if I want a beer and a piece of Watermelon I will let myself have one. True it’s not for everyone, not everyone has the willpower to control what they put in their mouth. We tend to reward ourselves with food instead of using it what its for, nourishment and fuel. It’s why our country is dying of obesity. Awesome that a size 10 women can put what she wants in her mouth everyday, exercise, and it not affect her weight but guess what, you are becoming the minority.
Sustainable is Key. Thank you for the article, it explained so much! I have been inclined to follow this diet but what has worked for me before is a diet that’s called “The AntiDiet” and is simply starting your day with fruits, while strictly separating complex carbs and proteins during lunch and dinner, and still being opened to consume all kinds of food. I had been trying the Whole30 for so long and so many times and I simply can’t, does not make sense for me and so does Keto in the sense of overloading on fats and meat. Thank you!
Noakes’s war on sugar goes back a generation, to when his father developed type-2 diabetes. Type-2 is a disease in which the body gradually loses its ability to regulate blood sugar through the production of the hormone insulin. It’s linked to genetics, but also to diet—particularly sugar and refined carbs—as well as obesity and inactivity. Diabetes experts estimate that the disease speeds up the aging process by roughly a third, damaging the body from the inside out. Too much blood sugar slowly destroys blood vessels, with results ranging from mild—early wrinkling of skin—to catastrophic: heart disease, blindness, stroke, amputations due to poor circulation, and even Alzheimer’s disease (more on that later).
If you stick to g of carbs, g protein, and g fat, you will eat kcal and lose kg (lbs) in the first month. Keep in mind that your body weight can fluctuate by ±2kg (±4lbs) on any given day from water weight and what's in your stomach. Recalculate your macro ratio once a month! Changes in body composition have a large influence on the recommendations and weight loss.

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On a ketogenic diet, your entire body switches its fuel supply to run mostly on fat, burning fat 24-7. When insulin levels become very low, fat burning can increase dramatically. It becomes easier to access your fat stores to burn them off. This is great if you’re trying to lose weight, but there are also other less obvious benefits, such as less hunger and a steady supply of energy. This may help keep you alert and focused.


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.
Thanks for the great article! As a fellow dietitian I think its challenging to stay on top of the fads and weight loss trends. The way I see it is that there are two types of ketogenic diets – lifestyle (for weight loss) and therapeutic for some of the medical conditions you mentioned above. Bottom line, the ketogenic diet is not a “natural” diet and there are serious associated side effects. I believe that people following the diet need to be supported by a team of medical professionals to ensure adequate monitoring.
Dr. Jeff Volek performed a similar study in obese males that also looked at possible effects of resistance training in combination with the diet. In this study, Dr. Volek used a true ketogenic diet consisting of high fat and low carbohydrates. He found a comparable pattern and magnitude of change in body composition to the aforementioned study (6). He later performed another study including men and women. In this study (7) the participants were instructed to not change any physical activity behaviors and to continue with their daily lifestyle habits. The two diet intervention groups consisted of a very low carbohydrate, ketogenic diet (VLCD: 9%C: 63%F: 28%P) and a low-fat diet (58%C: 22%F: 20%P). The amount of calories that were restricted for both groups was based on the individuals’ resting metabolic rate (RMR). The women in the low-carbohydrate, ketogenic group responded much more favorably to the diet, especially in terms of trunk fat loss. Meanwhile, both men and women lost significantly more fat in the VLCD group than in the low- fat diet group. As expected, RMR decreased in both groups; however, the men in the VLCD group maintained a much higher RMR relative to their body mass than those the low-fat condition did. This has important practical applications, as most people who diet tend to have decreased metabolisms that make take a long time to recover back to baseline and in some cases may never fully return to normal.

Steven has over 10 years of experience in online media industry at various positions throughout the editorial cycle. Because of his interest in presenting scientific knowledge to the general public as well as providing a platform for information dissemination, Steven decided to bring together a team of like-minded individuals and started Top Health Journal.

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I appreciate your approach to the keto diet it is the most unbiased I’ve seen. I decided to take a more mindful approach to the keto diet. I took the allotted carbohydrates and decided to count the net carbohydrates. I researched the most healthy vegetables highest in nutrition value and antioxidants and use those for my net carbohydrate allowance. Then using my lean muscle mass calculated the necessary amount of protein using the healthiest options like lean chicken breast fish with no bacon and no fatty Meats. I decided to get my fat grams from avocado olive oil and coconut oil. Monitored my micronutrients and supplemented them as necessary to reach the daily requirement. Using a vegetables I attempt to get the highest fiber possible and supplement the rest. I’ve changed my concept of what is cheating on a diet to indulging in fresh pineapple and watermelon raspberries blueberries and blackberries. Grains have always caused problems with feeling bad gastric bloating and water gain for me. So it was not difficult to decide to leave those off research the nutrition and a tip to substitute. as far as gaining all the weight back if you return to the diet that got you overweight you can only expect to get it back. A calorie Surplus will put on weight. As I near my goal I will increase the carbohydrates using the healthy foods I have grown accustomed to to achieve the highest level of carbohydrates that does not have me regain the fat. Because remember my protein intake was based on my muscle mass. As I follow the diet I am mindful of the behavior changes choices that caused me to gain weight and there is no getting off the diet there is only bringing balance to the macronutrients. If dietitians everywhere find my Approach unhealthy that is their opinion they have a right to. I’m using this strict limited diet initially for the weight loss success as a positive reinforcer while modifying my behavior using the healthiest food choices. Which does not include heavy cream butter and fatty Meats.
Ketogenic Diet is another excellent resource, focused on beginners and newcomers to the ketogenic diet. Written by Jeremy Stone, this book features 60 really simple recipes, that even the most modest chef can put together. With some basic knowledge of keto dieting, this book offers simple recipes which are easy to put together. More often than not, starting out what may seem like a highly restrictive diet can be very intimidating. However, this book looks to address those nerves.

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