I have been on a ketogenic diet because I'm a type 2 diabetic. I lost 50 lbs and dropped my a1c from 8.9 to 4.7. There are quite a few misgivings in this thread.
1. Calories in, calories out is a myth. What causes people to gain weight is too many carbs.
2. Even if your not a diabetic, a ketogenic diet is healthy for you because it reduces inflammation which makes you healthier and butter makes your pants fall off.
3. Ketogenic diet means you are a fat burner, not a carb burner. Fat burns slower and keeps you full.
4. Even if you don't go to a full ketosis diet, you can do yourself a world of favor staying away from processed foods.