One of the most common side effects of starting the ketogenic diet is the œketo flu. This term describes the often unpleasant, fatigue-inducing symptoms that occur as the body adjusts from a high-carbohydrate to a low-carbohydrate diet. During the keto flu, the body's stored glucose begins depleting, and the body starts adapting to producing and utilizing ketones as energy. (2)


Some dairy products can be used in moderation, such as heavy whipping cream and most cheeses. This would depend on your individual sensitivity to dairy (some people digest it better than others) and on the particular type of food. Milk contains a relatively high amount of carbs (4 to 5 g per 100 ml) and should be limited or avoided, as well as store-bought yogurt. You can, however, have unsweetened almond milk or heavy cream. Make sure to check the labels carefully when buying dairy products, as some of them contain a rather high amount of carbs. Some people also find that eliminating dairy helps them to lose weight faster, which might be something you want to consider in case you stall.
To be confident about being in ketosis, especially at the beginning when you're not quite sure how you should feel, it's best to measure your ketone levels. By monitoring your ketone levels, you can assure that you're doing the diet correctly and make dietary adjustments based on what you measure. People also respond to diet and exercise differently, so the best way to cater the keto diet to your own biology is to measure.
Gary D. Foster, Ph.D., Holly R. Wyatt, M.D., James O. Hill, Ph.D., Brian G. McGuckin, Ed.M., Carrie Brill, B.S., B. Selma Mohammed, M.D., Ph.D., Philippe O. Szapary, M.D., Daniel J. Rader, M.D., Joel S. Edman, D.Sc., and Samuel Klein, M.D., œA Randomized Trial of a Low-Carbohydrate Diet for Obesity ” NEJM, N Engl J Med 2003; 348:2082- 2090. http://www.nejm.org/doi/full/10.1056/NEJMoa022207.
I like it “ and I'm surprised I like it. I'm only down 5 lbs. after a month but I'm down 3 inches on my waist and 2 inches on my hips. I do feel better physically and I love not being hungry! I used to be that person who could eat pasta like a lumberjack “ now I often don't even finish my food. I have had a hard time sticking to 20 net carbs, I usually end up in the high 20's somewhere, but I'm in ketosis according to the testing strips. It's much harder to stick to 20 net as a vegetarian. Everything you eat has some level of carbs and they do add up. But overall, this is the only thing I've lost any weight or inches on in about 7 or 8 years. Starvation used to work until I hit 45 and then, forget it, I could eat 700 calories a day and not lose a pound. I'm so excited *something* is actually working.
On a œstrict (standard) keto diet, fats typically provides about 70 percent to 80 percent of total daily calories, protein about 15 percent to 20 percent, and carbohydrates just around 5 percent. However, a more œmoderate approach to the keto diet is also a good option for many people that can allow for an easier transition into very low-carb eating and more flexibility (more on this type of plan below).
Depending on how you choose your fats, the keto diet can contain an abundance of saturated fat, which raises levels of dangerous LDL cholesterol and causes atherosclerosis, the buildup of fats and cholesterol in the arteries. If you decide to go keto, have a doctor monitor your cholesterol levels monthly to ensure you remain within a healthy range.
It comes down to simple mathematics. In order to stay in ketosis, you need to eat a very very low number of carbs. And if you eat too much protein, this can actually knock you out of ketosis as well. Therefore, if you're eating almost no carbs, and you are eating moderate amounts of protein, the ONLY remaining macronutrient you can consume to fill you up each day would be fat. Add in that consuming fat allows you to stay in ketosis, and you are consuming a high fat, medium protein, low carb diet.
There are so many vegetables that you can use, and so many ways to prepare them, that an entire book could be written on the topic. Most vegetables that grow above the ground are high in fiber, vitamins, minerals, and antioxidants. They can be added to meat dishes, cooked on their own, or eaten as a salad. Vegetables are inexpensive, easy to prepare, and can be part of every meal. Most of them are quite low in carbohydrates, so it's hard to overindulge in this food group.
There are two major ways fasting is beneficial for overall health. First, it gives the body a break from digestion. Digestion is a surprisingly stressful activity, and if there is a longer period of time where your body can focus on simply using the nutrients it's been given already without having to handle more, digestion tends to improve, as well as energy levels.

Happy Transformation Tuesday 🤗🎉 I can honestly say a year ago, I never would've imagined surpassing my goal of a 50 lbs weight loss, but here I am 75 lbs lighter and feeling better than ever! The girl on the left was ashamed of her body and would cover it up to make sure no one would see it. The NEW girl on the right is confident, empowered, and STRONG! I feel so lucky to have a great support system around me and thank all of you who have reached out for advice or sent kind words 😊 Keep Calm and Keto On Friends! . . .
The ketogenic diet for weight loss is based on the idea that driving the body into ketosis will maximize fat loss. Ketosis is a normal metabolic process that occurs when the body does not have enough glucose stores for energy. When these stores are depleted, the body resorts to burning stored fat for energy instead of carbs. This process produces acids called ketones, which build up in the body and can be used for energy. (2)
If you're new to keto, watch out for hidden carbs. Generally, dairy products and nuts are a good way to meet your daily fat intake, but know that some of those items may contain more carbohydrates than you think. For example, yogurt topped with nuts may seem like a great keto-friendly snack, but a 5.3 ounce serving of plain yogurt has 12 grams of carbohydrates. Vanilla flavored yogurt has 24 grams of carbohydrates. Add an ounce of cashews, weighing in at nearly nine grams of carbs, and you're up to 21 to 33 grams of carbs for that snack, which could knock you out of ketosis. Be sure to read nutrition labels carefully and pay careful attention to serving sizes. Track foods using a keto-specific app like Senza or KetoDiet can help you stay within your recommended daily carb intake.
¢ Keto "Flu": Your body isn't accustomed to using ketones on the regular, so when you make the switch, you tend to feel unwell. The keto diet also influences electrolyte balance, resulting in brain fog, headaches, nausea and fatigue. Keto dieters also consistently complain about getting bad-smelling breath, sweat and pee as a result of the by-product of fat metabolism (acetone) seeping out. Thankfully, this effect is just temporary, so just know you won't have to spend your life smelling rank.
Gary D. Foster, Ph.D., Holly R. Wyatt, M.D., James O. Hill, Ph.D., Brian G. McGuckin, Ed.M., Carrie Brill, B.S., B. Selma Mohammed, M.D., Ph.D., Philippe O. Szapary, M.D., Daniel J. Rader, M.D., Joel S. Edman, D.Sc., and Samuel Klein, M.D., œA Randomized Trial of a Low-Carbohydrate Diet for Obesity ” NEJM, N Engl J Med 2003; 348:2082- 2090. http://www.nejm.org/doi/full/10.1056/NEJMoa022207.

¢ Cancer: Early experimental research suggests that the keto diet may have anti-tumor effects, likely because it reduces overall calorie intake (and circulating glucose) for tumor growth. In one 2014 review of animal research, a ketogenic diet was found to be successful at reducing tumor growth, colon cancer, gastric cancer and brain cancer. More research on humans with larger sample sizes is needed, but it's definitely food for thought.


At 4 weeks you should be feeling pretty darn good. If you are feeling better, but not awesome, give it a little more time. If you have not felt better throughout this time and have stuck strictly to your low carbs and high fat, your body may not align with the keto diet. If you only feel bad because you're craving bad food, this may be a mental "block" that you need to deal with. Coaching can help.
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: œI plan on being on the keto diet for the rest of my life, says Wharton. œMy 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.
Experts are split on whether the keto diet is a good idea. On the one hand, Lori Chang, registered dietitian and a supervisor at the Center for Healthy Living at Kaiser Permanente West Los Angeles, says using a œcleaner source of energy”ketones rather than quick-burning carbohydrates”can improve mood and energy levels. When you eat refined carbohydrates or just too many carbs in general, the blood is flooded with excess insulin, Chang says. "This can lead to a blood sugar rollercoaster that stresses the body and negatively impacts energy levels and mood. When you're in a state of ketosis, however, ketone bodies don't require insulin to cross the blood-brain barrier, which wards off unfavorable blood sugar levels."

In the first week, many people report headaches, mental fogginess, dizziness, and aggravation. Most of the time, this is the result of your electrolytes being flushed out, as ketosis has a diuretic effect. Make sure you drink plenty of water and keep your sodium intake up.6One of the fathers of keto, Dr. Phinney, shows that electrolyte levels (especially sodium) can become unbalanced with low carb intake.

In my book "Fat for Fuel," I sought to educate readers about the benefits of using healthy fats as a catalyst to bring about improved mitochondrial function, thus allowing you to achieve better health. In essence, the book answers WHY it is important for you to consume healthy fats. However, you still need to know HOW to prepare the right ketogenic foods in an appetizing way.


Thanks for the very informative article. This was the push I needed to at least try it. Starting next weekend, my partner and I will be trying keto for 30 days. I'm all for small changes, in theory, but what I sometimes discover is that sweeping changes can have their place, too, if they produce positive results. Often, what will work for me is trying a big change, and even if I then throw out 80% of it, at least the remaining 20% sticks. By contrast, any backsliding from a small change can often mean just throwing it out entirely.

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Medical Disclaimer: The material on this site is provided for informational purposes only and is not medical advice. Always consult your physician before beginning any diet or exercise program.

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