Hi Mikaylar,
Usually very quickly; maybe it might take up to 20 minutes. However, it will clean you out. Stay close to an unoccupied bathroom. This also works for ridding your body of excess gas which is good. You may require more than the one tablespoon. Try the one tablespoon first and see how it works and more importantly how you feel after you take it. This recipe is the same thing that the hospital used to give you before you had a colonostomy. But so many people complained about the bad taste that they stopped and started prescribing a medicine laxative that it was noted one of the side effects of it was possible death! I would never use that one. I just stayed with my baking soda and water.
PML