I found in any type of flush you do it is important to prepare yourself by doing some fasting. This will help your body to rid itself of some of the toxins that have built up in your body as a result of poor liver functioning. Start by getting off of fatty foods, then the carbs before launching into an all day fast. You can also do the apple juice and apples for a couple of days. The point is the Liver Flush is very powerful getting rid of some of the toxins beforehand should at least minimize some of the reactions.