Birth control pills are carecenogenic (sorry about the spelling). Stop taking them if you are going to cleanse. I really wouldn't recomend a master cleanse you have to do cleanses in steps it should take a full year at least with a variety of cleanses to cover everything. Thier is no miracle cure that will rid your body of everything cleanses take time patience and lots of healthy bacteria supplements. If you've been on birth control for al long time say over a year I would recomend taking I 3 C it's a brocolli extract only take it for 3 months. No longer if you want something even gentler and a whole food and oragnic take new chapter brocolli supplement for 6 months. It will cleanse extra hormones out of your body.