Oil Pulling 30 seconds or 15-20 minutes?

I've always read, prior to today & in mulitple articles & forums, that one should oil pull for15-20 minutes.
Today on a detox post, I read someone write to pull for no more than 30 seconds.

Which is it?

Post Edited (Usedtogarden) : 11/11/2014 4:47:35 PM (GMT-7)

Hmm. I've never heard of 30 seconds. I read Dr. Fife's book on oil pulling and he says 15-20 minutes.

thanks so much for pointing that out—I corrected that post!

-p