I do Liver Flushes without lemon and only two tablespoons of olive oil. Yet I got hundreds of stones out of me (all of them about 1/4 to 1/2 in. size). That would mean that one can produce about a pound of soap from one or two tablespoons of olive oil and without any lemon. How's that possible?
BTW, I used apples instead of lemon and the whole shebang of things that other use.
ps. There were tests done about this, when someone also ingested red food dies and stones didn't come out red. Pretty solid proof that whatever was ingested didn't effect formation of stones as they would be colored red or some dark combination of red and green.