A ketogenic diet is high in fat and low in carbohydrates. It’s called “ketogenic” because people on this diet shift from using glucose (a type of sugar) as their main fuel source to ketone bodies, which are derived from fat. In other words, people on the ketogenic diet can use their bodies’ fat stores as fuel—and this is why many studies show that this diet is superior for sustainable weight loss.
I can tell how passionate you are about this subject. As you can see on one of my reply’s above, CDE’s do not recommend the same number of carbs for every person we see; we use an individualized approach. It varies depending on the person’s height, bone structure/muscle mass, amount of weight they may need to lose (or gain) and the amount of exercise they may or may not do per day/week.
I have been on a low carb diet for over 2 years. I was diagnosed a diabetic with a blood glucose over 400 mg/dl and an A1C of 12. I tried my doctors recommendations for about a year and took all the medications they told me to take. not much changed. they wanted to put me on insulin after a year. I told my doctor that I thought I could control my condition with diet and he said, “you are to far gone for that”.
In the 21 subjects the successfully completed the study, scientists observed a 16% decrease in Hemoglobin Ac from baseline to week 16.  Subjects experienced an average decrease in body weight of 8.7 kg (19.2 lbs.).  Additionally, their average blood glucose levels decreased a total of 16.6% and their average triglyceride levels decreased 41.6%. 
Reduced hunger. Many people experience a marked reduction in hunger on a keto diet. This may be caused by an increased ability of the body to be fueled by its fat stores. Many people feel great when they eat just once or twice a day, and may automatically end up doing a form of intermittent fasting. This saves time and money, while also speeding up weight loss.