Hmmm what an interesting thread.

It seems then that there could potentially be two mechanisms at work with grapefruit then. Both the acidic environment and the enzyme inhibition.

I guess the only way to test this would be to try similar doses..one time with just oj and another time with grapefruit.

Theres alot of talk of people doin this oj, but not many people seem to have tried the grapefruit route.