The Bulletproof Diet (download the roadmap for free here) counters these side effects by keeping protein levels even lower. It is a cyclical ketogenic diet, which means you eat keto for 5-6 days a week and then do a weekly protein fast, which lowers inflammation and kickstarts fat-burning. This is much better for your body and spurs weight loss even more. The Bulletproof Diet also involves a carb re-feed day, where you eat slightly more carbs than usual. Since keto diets mimic starvation, you want to make sure your body knows that food isn’t scarce (this is especially important for women trying to conceive). 

What do LeBron James, Tim McGraw, and Halle Berry have in common? They all attribute their fab physiques to the keto diet plan, a high-fat, low-carb diet that is currently blowing up the internet. According to Google Trends, the keto diet peaked in popularity this week — and shows no signs of stopping. There are 4 million #keto posts on Instagram and more than 69 million keto diet recipes on Pinterest.[1] As the ketogenic diet goes mainstream, some news outlets have described it as another unhealthy celebrity fad diet. Here’s what you need to know about the keto lifestyle — and how the Bulletproof Diet does it one better.

There are three instances where there’s research to back up a ketogenic diet, including to help control type 2 diabetes, as part of epilepsy treatment, or for weight loss, says Mattinson. “In terms of diabetes, there is some promising research showing that the ketogenic diet may improve glycemic control. It may cause a reduction in A1C — a key test for diabetes that measures a person’s average blood sugar control over two to three months — something that may help you reduce medication use,” she says.
In theory, a ketogenic diet that increases carbohydrate loads for cardio exercise seems perfect. However, the side effects of a ketogenic diet can include dehydration, malnutrition and constipation. According to the Mayo Clinic website, ketogenic plans also can lead to kidney stones. In addition, the ketogenic diet does not give you the nutrition you need to be healthy. Instead, try cutting portion sizes and counting calories; this also can force your body to burn fat while still providing you with balanced nutrition, including proteins, carbohydrates, fiber and fat. As with any diet, you should discuss a ketogenic diet with your doctor.
Formulating the diet properly: The ketogenic diet allows for a lot of flexibility when it comes to the types of fats you consume. However, if most of your calories are coming from beef and bacon, fibre is left in the lurch. And when fibre is left in the lurch, your gut suffers. Don’t care about gut health? You should. An unhealthy gut is a major obstacle to fat loss. Supplement with probiotics to ensure your gut stays in good shape. 

The Johns Hopkins Hospital protocol for initiating the ketogenic diet has been widely adopted.[43] It involves a consultation with the patient and their caregivers and, later, a short hospital admission.[19] Because of the risk of complications during ketogenic diet initiation, most centres begin the diet under close medical supervision in the hospital.[9]
The last technique used to determine body composition in the current study was ADP (BodPod; Life Measurements Instruments, Concord, Canada), which is accepted as a convenient alternative to the water immersion method for assessing body composition. The standard BodPod protocol was followed (24), and weekly quality control tests were performed during the study period; a second calibration was conducted immediately prior to the measurement of each participant. ADP determines body volume using Boyle’s law of the pressure/volume relationship. Therefore, body volume is equivalent to the decrease of volume in the chamber with the entrance of the patient under isothermal conditions. The participants were instructed to wear a swimming suit tight to the body and a swim cap during the test to diminish accumulated air and avoid volume discrepancies. Thoracic gas volume was measured by connecting the subject to a breathing circuit. The process was repeated until a consistent measurement was obtained. Body density was calculated as mass divided by volume and corrected for lung volume. The Siri formula was used to calculate FM, FM%, and FFM (24, 25).

While you don’t have to be 100% accurate, you can use calorie counting as a starting point. It’s a way to measure how much energy you are actually taking in, and then adjust it to your needs. Obviously, a faster/slower metabolism, activity levels, endocrine problems, etc. will affect the amount of energy you will be expending, and therefore will affect the number of calories you need to take in.

We’re going full on fats with breakfast, just like we did last week. This time we’ll double the amount of ketoproof coffee (or tea) we drink, meaning we double the amount of coconut oil, butter, and heavy cream. It should come to quite a lot of calories, and should definitely keep us full all the way to dinner. Remember to continue drinking water like a fiend to make sure you’re staying hydrated.
“As a family doctor, I not only lost weight and improved my own health with the low-carb diet, I also inspired colleagues and patients alike to follow this lifestyle and reap its benefits. It has now become a powerful tool I use in my daily practice to help treat and reverse obesity, diabetes, fatty liver, PCOS, and chronic pain. I refer all my English-speaking patients to the Diet Doctor website and I also use it during visits as a counseling tool. Inspired by Diet Doctor, I have created my own website to cater to French-speaking patients!”
A popular keto supplement are exogenous ketones (popularly called “keto diet pills”) that may help you achieve results earlier as well as remain in that state. (Don’t confuse exogenous ketones with raspberry ketones, as the latter don’t raise ketone levels in the body or mimic endogenous ketones, so you wouldn’t use raspberry ketones in your regimen.)
Not surprisingly, he immediately and strongly advised that I abandon the keto lifestyle in favor of the Mediterranean diet. I was incredibly disappointed, given the ease with which I had lost weight, though I understood his position and followed his counsel. In the past several weeks, I have gained some weight back, though certainly not all, and generally feel unhappy about the direction I seem to be headed. I have not had cholesterol levels checked again. I very much want to return to the keto lifestyle I was following, but I respect my provider and don’t want to make decisions that might lead me to poorer health down the road.

Gluconeogenesis is the endogenous production of glucose in the body, especially in the liver primarily from lactic acid, glycerol, and the amino acids alanine and glutamine. When glucose availability drops further, the endogenous production of glucose is not able to keep up with the needs of the body and ketogenesis begins in order to provide an alternate source of energy in the form of ketone bodies. Ketone bodies replace glucose as a primary source of energy. During ketogenesis due to low blood glucose feedback, stimulus for insulin secretion is also low, which sharply reduces the stimulus for fat and glucose storage. Other hormonal changes may contribute to the increased breakdown of fats that result in fatty acids. Fatty acids are metabolized to acetoacetate which is later converted to beta-hydroxybutyrate and acetone. These are the basic ketone bodies that accumulate in the body as a ketogenic diet is sustained. This metabolic state is referred to as "nutritional ketosis." As long as the body is deprived of carbohydrates, metabolism remains in the ketotic state. The nutritional ketosis state is considered quite safe, as ketone bodies are produced in small concentrations without any alterations in blood pH. It greatly differs from ketoacidosis, a life-threatening condition where ketone bodies are produced in extremely larger concentrations, altering blood ph to acidotic a state.
^ Jump up to: a b c d e f "Top 5 worst celeb diets to avoid in 2018". British Dietetic Association. 7 December 2017. The British Dietetic Association (BDA) today revealed its much-anticipated annual list of celebrity diets to avoid in 2018. The line-up this year includes Raw Vegan, Alkaline, Pioppi and Ketogenic diets as well as Katie Price's Nutritional Supplements.
I’m following the ketogenic diet and I find it very easy, pleasant and varied. I can even say that my diet today is more varied than the previous one. I do not intend to leave this diet and I cannot really see why. My initial focus was not to lose weight, I’ve always been lean, but to feel better, well disposed. And I got it! I am very pleased, I have read a lot about it (including scientific literature) and I have influenced other people who need to lose weight or improve some aspects of their health. But from the beginning I went on my own way, without the help of a nutritionist because I did not want to suffer the influence of others’ ideas.
“Net carbs” and “impact carbs” are familiar phrases in ketogenic diets as well as diabetic diets. They are unregulated interchangeable terms invented by food manufacturers as a marketing strategy, appearing on some food labels to claim that the product contains less “usable” carbohydrate than is listed. [6] Net carbs or impact carbs are the amount of carbohydrate that are directly absorbed by the body and contribute calories. They are calculated by subtracting the amount of indigestible carbohydrates from the total carbohydrate amount. Indigestible (unabsorbed) carbohydrates include insoluble fibers from whole grains, fruits, and vegetables; and sugar alcohols, such as mannitol, sorbitol, and xylitol commonly used in sugar-free diabetic food products. However, these calculations are not an exact or reliable science because the effect of sugar alcohols on absorption and blood sugar can vary. Some sugar alcohols may still contribute calories and raise blood sugar. The total calorie level also does not change despite the amount of net carbs, which is an important factor with weight loss. There is debate even within the ketogenic diet community about the value of using net carbs.

Collagen is a type of protein that has been shown to suppress appetite[*], provide fullness compared to other proteins like whey, casein, or soy[*], help retain muscle mass[*] and even help to reduce the appearance of cellulite due to it’s ability to improve skin elasticity and thickness[*]. Refer to this article for more information on the benefits of collagen and the best way to supplement it in your diet.


Our bodies are incredibly adaptive to what you put into it – when you overload it with fats and take away carbohydrates, it will begin to burn ketones as the primary energy source. Optimal ketone levels offer many health, weight loss, physical and mental performance benefits.1There are scientifically-backed studies that show the advantage of a low-carb, ketogenic diet over a low-fat diet. One meta-analysis of low-carbohydrate diets showed a large advantage in weight loss. The New England Journal of Medicine study resulted in almost double the weight loss in a long-term study on ketone inducing diets.
I used an online keto calculator to set a goal for calories, carbs and fat. I mostly followed the suggestions, with the exception of fat. The calculator suggested over 200 grams of fat each day. That's tough to hit without loading ghee into my coffee or swigging some coconut oil before lunch. Can it be done? Absolutely. I just couldn't get there. For me, the focus was on reducing carbs. I let the other pieces just fall into place.
“At the Norwood Surgery in the North of England we have been offering a low-carb option for our patients with type 2 diabetes since 2013. We feel this makes perfect sense in a condition which could be seen as one where sugar is acting as a ‘metabolic poison’, remembering that starchy carbs like bread rice or breakfast cereals digest down into surprising amounts of sugar, as predicted for us by the glycemic index.”
Most carbs you consume are broken down into sugar that enters the bloodstream. When you rein in carbohydrates on the keto diet, you have lower levels of blood glucose (high blood glucose can lead to diabetes). A study in the journal Nutrition reveals that a ketogenic diet improves blood glucose levels in type 2 diabetics more significantly than a low-calorie diet and can also decrease the dosage of your diabetes meds.

“One of the best meal planning tips I’ve ever received is to structure breakfast and lunch so that you don’t have to think too much about it,” says Emily Bartlett, co-founder of Real Plans. “If you’re OK with repetition, it’s ideal to have a simple selection of recipes for breakfast—including some that can be taken on the go. For lunch, go ahead and use your leftovers with a fresh green salad, and be sure to include a dressing that you really love.” Before you make your keto diet menu, check out the 13 things doctors want you to know about the keto diet.
In general, you want to eat the minimum amount of protein to preserve lean body mass and not overtax your kidneys. If you eat too much protein, the excess converts to glucose through a process called gluconeogenesis. You don’t want that to occur in ketosis. Instead, eat anti-inflammatory protein—at the minimum amount to preserve or build lean body mass. My favorite sources are wild-caught fish, grass-fed and -finished beef and wild meats (elk, bison, etc.), pasture-raised poultry, nuts, and seeds. Make sure fish has more selenium (which helps protect the brain) than mercury, to mitigate heavy metal toxicity. Good sources that have a safe selenium/mercury ratio include: tuna, opah, wahoo, spearfish, swordfish.
Much of the research into low-carbohydrate dieting has been of poor quality and studies which reported large effects have garnered disproportionate attention in comparison to those which are methodologically sound.[5] Higher quality studies tend to find no meaningful difference in outcome between low-fat and low-carbohydrate dieting.[5] Low-quality meta-analyses have tended to report favourably on the effect of low-carbohydrate diets: a systematic review found that 9 out of 10 meta-analyses with positive conclusions were affected by publication bias.[5]

I also asked a friend to join me as an accountability partner. She had tried the keto diet before with good success, so having a guide for my myriad questions was a big help. It was also nice to have someone to message at 10 p.m. when I really wanted a cookie so she could commiserate with me. (We agreed the cookie would be delicious, and then ate a cheese stick.)
Low-calorie diets leading to rapid weight loss can cause headaches -- especially if your carbohydrate intake is too low. A study published in 2011 in the "Nutrition Journal" reports that symptoms of ketosis, which occurs when there is a buildup of metabolic byproducts called ketones in the body after breaking down fat instead of carbs as fuel -- include headaches, bad breath, weakness and constipation. To reduce your chance of getting a headache during weight loss, eat at least 130 grams of carbohydrates -- which is the recommended dietary allowance, or RDA -- daily and avoid losing more than 2 pounds per week.
Remember the low-fat diet craze? Back in the 1990s, we were told that swapping regular cookies and chips for those labeled "low fat" would be the ticket to easy weight loss and better health. Today, it's the opposite—a low-carb, high-fat eating plan called the ketogenic diet, or keto diet for short, is getting all the buzz. Celebrities like Halle Berry, Kim Kardashian, and Megan Fox are fans; more than 7 million Instagram posts have been tagged #keto; and upwards of 1 million people search "keto diet" on Google every month.
Animal proteins (meat, fish, etc.) have very little, if any, carbs. You can consume them in moderate amounts as needed to control hunger. Overall, choose fattier cuts of meat rather than leaner ones. For example, chicken thighs and legs are preferable to chicken breasts because they contain much more fat. We’ve got quick keto diet chicken recipes to help.
1. Aragon AA, Schoenfeld BJ, Wildman R, Kleiner S, VanDusseldorp T, Taylor L, Earnest CP, Arciero PJ, Wilborn C, Kalman DS, Stout JR, Willoughby DS, Campbell B, Arent SM, Bannock L, Smith-Ryan AE, and Antonio J. International Society of Sports Nutritionists Position Stand: Diets and body composition. Journal of the International Society of Sports Nutrition 14:16, 2017.
It was recently reported that the consumption of diets with low percentages of carbohydrates over a long period of time (>25 years) are associated with higher mortality [63]. This association was mitigated when the substitutions were plant-based [63]. In the current study, patients were exposed to a low carbohydrate intake during less than 90 days and the source of carbohydrate was from vegetables. Moreover, the strong weight loss induced a decrease in the burden of obesity-related disease [6]. Thus, the strength of the current study is reinforced with the consistence of the results with that of previous research, regardless of the strong dietary energy restrictions induced by a VLCK diet.

Health experts think that the first law is relevant to why we get fat because they say to themselves and then to us, as the The New York Times did, “Those who consume more calories than they expend in energy will gain weight.” This is true. It has to be. To get fatter and heavier, we have to overeat. We have to consume more calories than we expend. That’s a given. But thermodynamics tells us nothing about why this happens, why we consume more calories than we expend. It only says that if we do, we will get heavier, and if we get heavier, then we did. 
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