I.P.,

I wouldn't worry about taking soybean oil unless your bcl-2 levels are
already very high.  If you are taking Proscar of Avodart, then you
should avoid all soy.  Another possible reason to avoid soy would be
if you had a Gleason 9 or 10 score.  The more aggressive PCa's have
slower rates of apoptosis.  In many cases, this is due to too much
bcl-2, but in some cases due to some other mutation.  Since you don't
know which is the case, to be safe it would be best to avoid soy for
those men.

However, if you don't already have high levels of bcl-2, then the use
of soy should be benificial.  Numerous studies have demonstrated its
anti-cancer properties.  The problem for men with PCa is that you
don't know how much above or below average your bcl-2 levels are in
your cancer cells, and even if you did know, the population is
heterogeneous so there most likely will be some cells that thrive on
the soy.

To summarize, for all practical purposes, moderate amounts of soy
should do little or no harm and may do some good.  Massive amounts may
kill some more cancer cells, but may spur the growth of others.  The
only exceptions to this is if you are taking 5AR2 inhibitors or are
known to have extremely aggressive PCa cells in you.

Ed Friedman