I do intermittent fasting, 20/4. Basically I only eat in a 4hr window at the end of the day. Intent is to be awake, burning calories, in a fasted state for the most time possible. First few days ghrelin really works against you, but as stated, if you are eating keto, high fat, high protein, minimal carbs, you will stay sated all day. There is no surge of energy with a crash, no post lunch lethargy, etc. I normally eat all of my calories/macros in two large meals between 1800-2200. I would just eat it in one meal, but often I'm totally stuffed after just 50%.