I don't use the Olive oil liver flush. I don't use oil at all. I still get green stones from time to time though usually tan ones, and I had my gallbladder removed 2 years ago. I flush by magnesium citrate and coffee enema method. So it definately is not from olive oil, because I can't drink it, I puked when I tried the first time 2 years ago and haven't tried it since. I have very successfull flushes my way. Much more comfortable than the oral oil flush.