If I remember correctly, Zoe drinks the Yogi tea during the day/evening as an addition to her lemonade, not as a replacement for the laxative tea. Have you checked out her blog? I don't have the link but you can go to the "blog" section and look under "T" for " The Master Cleanse Express". It is filled with TONS of info. In particular see her section called "Junk in the Trunk".
Hope this helps you some. We all miss her and hope she hurries back. Zoe Rocks!