First few weeks you will probably have the runs.. 3rd week probably pretty lethargic. By week 4 or 5 you are going to have crazy energy levels.
About to do it again soon myself. It's my preferred way to cut back weight
Discussion
I have unbelievable energy right now, eating one meal a day
Should I add another meal if I'm eating only meat?
What are your thoughts?
If you feel your energy drop off, then yes.
The basic idea is eat when you are hungry, but I find I end needing to force feed myself or I will eat way to little and loose muscle and not just fat.
For me the magic spot is about 3lbs of beef a day. 2 normal ribeyes would be way to little calories for me. I weight 210 so I'm not huge, but I exercise and get cardio a few days a week.
If you are OMAD now your body may shift to ketosis a lot easier and you won't see an energy drop like most do.