I have for the last four weeks reduced carbs in my diet. Goal is to lose the stubborn fat which was resistant to all my workouts and diet restrictions. I found about 90% of the time my energy levels on this diet are off the scale, and weight is dropping, but that other 10 percent is like I am out of fuel. I like the diet, like the low blood sugar levels and want to know what causes the slump and how to avoid it. I have cut net carbs to less than 15 gms per day. Blood fats, triglycerides, and cholesterol have fallen like rocks so that is not a concerns. I try for a 75%fat to 25%protein. Too much fat is not an issue with me unless having too low a level in blood fats is a problem. My body seems to thrive on it. I keep calorie intake around 2000 which is where I was on the pre ketone diet.