You just need to get used to transitioning to the lifestyle and it is still possible to overeat with OMAD. Part of losing weight is learning about self-discipline.
I have been doing OMAD for at least 6 months straight without issues and this is usually what I do:
- Drink at least 1 US gallon of water a day
- Get enough sleep during the night
- High carbs and high protein (because I’m an athlete) diet
It’s normal to get headaches when you first start fasting, or extending your fasting window. The headaches should go away once you get accustomed to it, as long as you’re getting enough nutrients and enough water. Do you eat a lot of carbs in your meal? Switching to a low carb/high fat diet can help you transition into fasting longer periods of time. Your method is completely up to you though :) Good luck!