My energy is fine for the most part. I have a little low point after I clean the stalls and take care of the horses. Those chores takes a few hours so I timed my eating window to start shortly after my afternoon energy slump. I was low carb for a long time before I started fasting so I was aready well adapted to low carb. I tried to have a one hour eating window and I had a major energy slump about two hours before my eating time.