I was planning on doing The Master Cleanse for just one day. Will that be benefial at all? About a month ago I did a 5 day lemonade drink cleanse and completed a 21 day detox menu plan. During that time I found out I am allergic to gluten. At this phase of my program I am adding foods to see how my body reacts. So I thought I would do the Master-Cleanse just for one day as to not disrupt the purpose of the program I am following.