Traditionally, in the sports nutrition field, we talk about the importance of timing carbohydrate and fluid intake on improving sports performance. For some time now, research has been looking at the role of very low carbohydrate diets on sports performance. Trailblazers in keto and sports performance research like Dr. Stephen Phinney have been conducting studies in this area since the 80s. In one of his studies, the glycogen stores of cyclists on a keto diet were not completely depleted and lipid oxidation was increased. Researchers concluded that the body was able to adapt to the lack of carbohydrates and preserve what was needed to use the fat as fuel.  However, based on the VO2 max breath test, since the body was attempting to preserve the carbohydrate during the exercise, it appears that the intensity of the exercise was limited. In a more recent study, off-road cyclists following a keto diet experienced small improvements, but still not significant enough to make strong conclusions.
Following a very high-fat diet may be challenging to maintain. Possible symptoms of extreme carbohydrate restriction that may last days to weeks include hunger, fatigue, low mood, irritability, constipation, headaches, and brain “fog.” Though these uncomfortable feelings may subside, staying satisfied with the limited variety of foods available and being restricted from otherwise enjoyable foods like a crunchy apple or creamy sweet potato may present new challenges.

I give you points for not completely bashing the Keto diet but I have to ask you why do you think it is hard to follow? Do you tell vegans that their diet in unsustainable? I know for myself I can go to almost any restaurant and eat a keto meal the same could not be said with vegans. A properly balanced keto diet would require no vitamins or minerals (the reason for Keto “Flu”) the same can not be said for vegans, most vegans have major deficiencies and some vitamins like B12 are near impossible to obtain without supplements.

What carbs should I avoid


The ketogenic diet has been shown to produce beneficial metabolic changes in the short-term. Along with weight loss, health parameters associated with carrying excess weight have improved, such as insulin resistance, high blood pressure, and elevated cholesterol and triglycerides. [2,7] There is also growing interest in the use of low-carbohydrate diets, including the ketogenic diet, for type 2 diabetes. Several theories exist as to why the ketogenic diet promotes weight loss, though they have not been consistently shown in research: [2,8,9]

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Abbey, I appreciate all the work you put into this but there are a few things you missed. Not all oils are keto friendly. Vegetable oils are a huge no-no which was not mentioned. Regular mayo usually contains soybean oil which should be avoided. You also missed that foods with preservatives are a no-no which excludes some cheeses (you said enjoy all the cheese you like). Processed sliced cheese or pre-shredded cheese in a bag at the grocery store contains preservatives. Ever notice how shredded cheese in a bag never sticks to itself but when you shred your own cheese it sticks? Preservatives. Most nuts are okay but peanuts are a legume and should be consumed in very small amounts or avoided altogether. Don’t go crazy either, nuts do have carbs. I don’t eat more than a half cup a day of salted almonds. That said, you could have mentioned that getting salted nuts is ideal as you do excrete more salt and other minerals in your urine (eating keto is diuretic so attention must be paid to salt, potassium, magnesium, etc. as you did mention) so finding simple ways to add salt and other minerals is helpful. I also take a multi-vitamin daily. You mentioned you cannot do high intensity workouts. You are not supposed to do high intensity workouts as elevating your heart rate too high actually stops the fat burning process in your body. Your heart rate should be 180 beats minus your age +/- 5 beats depending on fitness level. A 40 year old obese person shouldn’t go over 135 beats/min during a workout as that is the optimal fat burning window. Higher than that and your body reverts to storing fat reserves thinking it will run out if it keeps this pace. Which bring me to metabolism. Its been long believed a high metabolism is good. A high metabolism leads to more hunger (because you’re burning glucose faster), ingesting more food, and typically gaining more weight. Slowing your metabolism down AND teaching your body to consume slow burning ketones instead of quick burning glucose puts less stress on your liver mainly and on your body in general. There’s a lot more but this is getting long so I’ll finish with this. You said this diet focuses on quantity of food and not quality. This is confusing to me….wouldn’t organic and grass-fed meats, be of better quality than non-organic and grain fed meat? (they feed animals grains to fatten them up….shouldn’t that be a huge warning sign for us?). Is food without preservatives not better quality than food with preservatives? Aren’t beverages with no sugar or artificial sweeteners of better quality than sugar/artificial sweetener-filled beverages? I’ve never seen any keto advocate advise ignoring quality foods, in fact its quite the opposite.
Hi. I have been on the keto diet for 6 weeks and have not lost any weight but even more concerning, my gerd is much worse. I’m taking ppi’s just to stay on the diet. Constipation which has always been an issue for me is now much worse, hello laxatives! For these reasons, I have decided to go back to a more balanced diet leaning towards vegetarian. Keto works for some, I’m not one of them. I appreciate your info.
Adequate protein intake and developing ketosis are both critical for maximising fat loss and sparing muscle mass during the ketogenic diet. However, it will take up to 3 weeks before your body gets keto-adapted (in some cases even more). During the initial phase of the ketogenic diet, nitrogen losses may occur if your daily net carbs intake is very low. When your carbohydrate intake goes down, your body converts body protein into glucose. Since about 16% of protein is nitrogen, you may lose muscle mass which will cause a decrease in your metabolic rate. This could have a negative impact on fat loss. For example, if your carbs intake is close to zero, you you may have to eat more protein (aka protein sparing modified fast). Keep in mind this applies to zero carbohydrate intake which means it does not affect most people following the ketogenic diet.

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So where did the ketogenic diet come from? Interestingly enough, this fad diet didn’t spark from a celebrity endorsement or some guy missing a medical license. There’s evidence of the keto diet being used back in the early 1920s to treat severe childhood epilepsy and it’s still being used today for that purpose. Research suggests that the production of ketones may influence neurotransmitter activity in neurons allowing for a reduction in seizure attacks. A recent Cochrane Review demonstrated a 30-40% reduction in seizures compared with non-keto diet controls. One thing to keep in mind, however (which is a theme when discussing the keto diet) is that it’s generally difficult to adhere to and difficult to tolerate for a lot of people. In other words, people go on it and then come off it pretty damn quick.

Is constipation a sign of ketosis


As you walk around the store, stick to the outer edges. The outer aisles have the freshest food. Think about your neighborhood grocery store. Most often the deli, the meat counter, and the produce section are all along the sides of the store with the packaged items in the aisles. Once you add more carbohydrate grams to your daily limit, you can start to experiment with low-carb packaged foods.

Such an in-depth post (and I applaud you for remaining so professional throughout some of these comments)! I’ve heard a lot about the keto diet and am glad that it does seem to work for some, but am definitely more on board with a more balanced diet. Kudos to the people it does work for though (I’ve had several patients with epilepsy who follow a ketogenic diet and it does seem to be helpful for them)!

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With more than 200 pages of colorful, informative recipes, The Essential Keto Cookbook is, as per the title, a tome of vital food options for those following the keto diet. The authors, Louise and Jeremy Hendon, are a power couple in the field of high fat, low carb diets. Alongside each recipe, the authors have provided the full nutritional information including the carbohydrate counts, to help you keep track of what you are consuming. As part of this purchase, you will also get a fully developed meal plan to assist you in sustaining this energizing and filling diet. 

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I tried the ketogenic diet and it really helped me even out my energy levels and I don’t grave sugar anymore. I had issues absorbing my B vitamins. I had high candida and l-acidophylis levels. I was also addicted to sugar. I started this 3 years ago, and since about a year ago, I’ve added fruit. Now I enjoy a little rice and potatoes as well. I even had a bite of chocolate cake and didn’t die. I started out at 112, lost 10 pounds within a month and have slowly gained most of it back. I am happy I did it, but I will be more confident to add more carbs, although it will mostly be in the form of more fruit and starchy veggies. Thanks for your article.

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Total carbs is not a precise indicator of the carb content of a food. When you see “total carbs” on a food label, the number beside it represents the cumulative total of grams of dietary fiber, sugar, and sugar alcohol that are in that food item or beverage. Net carb content, on the other hand, relates to the carb content of the food that is digested at four calories per gram and impacts your ketones levels.

The keto diet is high in fat, moderate protein, and low in carbs. You will avoid foods that are high in carbs, including some fruits and vegetables, most vegetable oils (like canola and corn oil) sugar, and grains, to name a few. Instead of going over all the foods to avoid, it is easier to print the keto grocery list pdf at the bottom of this post and stick to those keto foods for simplicity.

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Before I went into ketosis and before I cared anything about keto meals chicken was a staple in our home. While I do love all things chicken, I have found that going the boneless skinless route can sometimes get old, boring, and you lose some of the fat. Remember that you don’t have to choose lean meats anymore. Can you still eat it? Of course, but you need to try to dress it up with fat anytime you can. This low carb poultry list isn’t exhaustive, but I think it’s enough to get you started.

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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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The low-carbohydrate diet options available in this book are also sugar-free, gluten-free, legume-free and in some cases dairy-free. While these may seem like restrictions on your diet, this book has so many delicious recipes to offer that you’ll not even miss carbohydrates or sugars, so often a major part of contemporary diets. This book also contains an in-depth list of foods which are suitable for eating when following keto. This ketogenic diet food list will help you stick to the diet while enjoying delicious food.
Today makes 3 months since I started Keto and I have lost 43 lbs. The way it works for me is by using a meal logging App and sticking to it daily and trying to reach the macronutrient goal percentages as closely as possible. In addition, I have found that, for me, “unlimited amounts of protein and fat” does NOT work for me. I have to carefully restrict total daily calories and mix it “intermittent fasting” with lots of hydration to get the ketosis going. I also find that if I can eat low-carb high fiber greens like arugula, celery, non-peanut no-added-sugar seven-nut butter, walnuts, avocado and lots of water and soups, it helps me avoid constipation. I am feeling so much better without the weight, my sleep apnea is gone and edema in my legs is gone but I do have concerns about the saturated fat, my HDL/LDL and I do not like the “nail polish breath”. I have also read many articles on Keto and most are either “all in” or “no way” so I would like to thank you for the “balanced discussion” in this article. It must have taken lots of effort for a nutritionist to examine Keto in a balanced, objective style. Thanks again.

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Anyways, I am feeling so much better without the weight, my sleep apnea is gone, my blood glucose is lower and the edema in my legs is gone. But I do have concerns about the saturated fat, my HDL/LDL and I do not like the “nail polish breath”. Once I reach my goal, I plan to transition to more of a Mediterranean style diet but still with logging and I hope to be able to keep the weight off.

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No, you won’t need every single item on a keto grocery list at any time. Instead, a list is simply a guideline to help you to make the best food choices while you are shopping for keto foods. You don’t need to stock every single kind of nut butter, oils, sweeteners, etc. Pick the ones that you like the most, and stock those as needed. Then, you can build your keto pantry over time.
Shopping for the keto diet will take some time to get used to. You’ll be navigating parts of the grocery store that you may not be familiar with. You’ll also be purchasing items you’ve never cooked before. However, with planning and dedication, low carb shopping will become easier. Just remember to make a list before you visit the store and stay toward the outer aisles of the grocery store. In no time, you’ll be an experienced low carb shopper.

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Here’s why. All of these effects take time, but a reasonable explanation as to why the keto diet leads to rapid weight loss is due to the loss of water weight. One of the concerns with the keto diet is the loss of muscle mass and the depletion of glycogen stores. Glycogen, which stores our glucose, also stores water, so when stores are depleted, we flush out excess water. In other words, that rapid weight loss isn’t fat, it’s just water.
It’s always good to go into the grocery store with a game plan so you don’t buy things you’ll regret later. I also like to keep things as simple as possible. Going through Pinterest, every recipe seems to have a bazillion ingredients, take hours & a culinary degree to make, or require random ingredients that are annoying to find and super expensive.

In 2014 — for the first time — I discovered a low carb diet called Ideal Protein. It’s different from Keto in that you also keep a low fat intake as well. I can’t speak for Keto as I’ve not done it personally, but I lost 80 pounds on Ideal Protein in 5 months. It fit into my life as a busy mom and returning college student because I didn’t have to spend hours at the gym. I just ate low carb and moderate protein.

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It is now a mainstream dietary regime used wih the intent to reduce weight as it is safe for most people, but one should be especially aware of going ketogenic if one takes diabetes medicine, medication for high blood pressure or is breastfeeding. Typical foods include cheese, eggs, fish and seafood, natural fats, meet, vegetables that grow above ground. The key to maintaining the diet is low carb intake - usually with the goal of eating less than 50 grams or even less than 20 grams of carbohydrates per day. The fewer the carbs, the better, usually. Things to avoid include: fruit, potatoes, pasta, beer, bread, soda, chocolate, candy, donuts, etc.

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I love prepping meat days in advance, so I don’t have to cook meat for every meal. Organic processed meats are quick and easy, but they also cost more, so it’s up to you. Also, be sure to save the chicken broth for cooking other foods and making soups. Feel free to cook your poultry in bacon grease to add additional fat. Avoid sauces unless you are using low carb poultry sauces or dips. I try to use low carb herbs and seasonings on all of my poultry; it may seem like a lot of work to figure these things out, but trust me, you’ll get the hang of it in no time.
To meet your macros most efficiently, try combining high protein with high-fat foods or have foods that are both high in protein and fat at every meal. For example, having a fatty fish or fatty cut of meat with high-protein cheese (and low carb vegetables) is a simple and easy way to have a keto-friendly meal that will help you meet your protein and fat needs. On the other hand, if you just want to increase your fat intake, then find ways to add oil, animal fats, butter, fat bombs, and/or high-fat cheeses to your meals or snacks. 

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