sf wrote:
>
> On Fri, 25 Jun 2010 10:03:22 -0700 (PDT), John Kuthe
> > wrote:
>
> > Grapefruits are weird. They interact with a LOT of medications.
>
> I wonder why grapefruit and not lemon, lime or pineapple?

Grapefruit has much more naringin than other citrus,
which gives grapefruit its bitter taste, and this may be
the reason, but the exact cause is still controversial.

http://www.ncbi.nlm.nih.gov/pmc/arti...tool=pmcentrez

http://en.wikipedia.org/wiki/Naringin