Recently, many of my patients have been asking about a ketogenic diet. Is a ketogenic diet safe? Would you recommend it? Despite the recent hype, a ketogenic diet is not something new. In medicine, we have been using it for almost years to treat drug-resistant epilepsy, especially in children. In the s, Dr. Atkins popularized his very-low-carbohydrate diet for weight loss that began with a very strict two-week ketogenic phase. Over the years, other fad diets incorporated a similar approach for weight loss. In essence, it is a diet that causes the body to release ketones into the bloodstream. In the absence of circulating blood sugar from food, we start breaking down stored fat into molecules called ketone bodies the process is called ketosis. Once you reach ketosis, most cells will use ketone bodies to generate energy until we start eating carbohydrates again.
Restricting carbs and increasing fat intake can lead to ketosis, a metabolic state in which your body relies primarily on fat for energy instead of carbs 1. Carb intake on the keto diet is typically limited to fewer than 50 grams per day, which can come as a shock to your body 2. As your body depletes its carb stores and switches to using ketones and fat for fuel at the start of this eating pattern, you may experience flu-like symptoms. These include headaches, dizziness, fatigue, nausea, and constipation — due in part to dehydration and electrolyte imbalances that happen as your body adjusts to ketosis 3. As your body adjusts to using ketones and fats as its primary energy source, you may experience flu-like symptoms at the beginning of the keto diet. If you eat a lot of these foods, you may have a higher risk of kidney stones. Given that citrate can bind to calcium and prevent the formation of kidney stones, reduced levels of it may also raise your risk of developing them 5. Additionally, people with chronic kidney disease CKD should avoid keto, as weakened kidneys may be unable to remove the acid buildup in your blood that results from these animal foods. This can lead to a state of acidosis, which can worsen the progression of CKD. Eating a lot of animal foods on the keto diet can lead to more acidic urine and a higher risk of kidney stones. This acidic state can also worsen the progression of chronic kidney disease.
This high-fat, very low carbohydrate diet typically means eating fewer than 50 grams of carbs a day — less than four slices of bread’s worth. Ketosis is actually a mild form of ketoacidosis. Effects of a low-carbohydrate diet on weight loss and cardiovascular risk factors in overweight adolescents. Figure 7. There have been many cases of large populations consuming almost identical diets for many decades, not just Okinawa. There was a significant decrease in the level of triglycerides, total cholesterol, LDL cholesterol and glucose, and a significant increase in the level of HDL cholesterol in the patients. Shame on Brazil, shame on the US of A. I do not know if I am in ketosis but I do the daily fast of hours, drink homemade bone broth and use only the fat she recommends. Postexercise ketosis is a well-known phenomenon in mammals. Dietary restriction and glucose regulation in aging rhesus monkeys: A follow-up report at 8.