If you want more bile for the liver to push out, then don't eat anything with fats the day before either. Remember, not eating fats doesn't just mean no butter/margarine on your potatoes, etc., it means don't eat any foods that naturally have fats in them, such as garbanzo beans.soy beans, nuts, etc. If you eat this way the day before as well as the day of a LF, you will have plenty of bile pressure built up.