One bottle lasts for quite a while. One bottle has 120 capsules.
They recommend a 7-day cleanse, and then maintenance after that.
They say to try taking 4 capsules a day, BUT - I would suggest starting with less to see how it works for you. I read someone else's posting about it, and she said she was fine with 1 a day. So, I would say try working *up*, instead of down.
Plus, the bottle will last longer!