I only ate some butter on my toast in the morning and didn't eat anything greasy at noontime in order to let the pressure build up in my liver. I probably ate what you would consider light meals the day of the flush. I am not sure if it makes any difference with eating lighter with less oils the day of the flush with the Coke flush or not. It always worked, anyway. I also made sure I got some extra distilled water into me for a day or two after the liver flush in order to clean the toxins out.