To be honest with you, I wouldn't do much oil pulling during the MC. We'll need some more evidence either way, but OP/OS increases both salivation and metabolism. Personally, I wanted both to level to what my body demanded on the Master-Cleanse without any extra stimuli. There is also speak of actually pulling some minerals out of your system, perhaps only a minor amount, but again, I'm just a bit wary of depleting anything my body might need while during the MC. The increased salivation action *may* increase your hunger feelings -- again we'll need better evidence than my assumptions!