I did a ten day Master-Cleanse a while back -- a few weeks...hmm, let's see. (checking date book)
Started on April 5. Prior to that, I'd begun the oil swishing, but I can't remember exactly when. As of now, I've been doing the oil therapy for a month and a bit, I guess.
I felt like it was all good, and didn't conflict with the MC. My concern was that I might feel a big detox. I find the cayenne a bit difficult (burning eliminations, or maybe it's the acid) so I didn't want to stir up too much. As it turned out, I really enjoyed the soothing nature of the oil pulling. I tried it today with olive oil and the experience was not pleasant, though I love to eat olive oil. It left a sort of bristly feeling on my teeth and tongue, whereas the sunflower oil feels very cleansing and soothing. (I ran out of it-- that's why the olive oil)