nope.  there are lots of indian potato recipes (some of which use
turmeric).

I agree with all of your arguments.  The data supporting dietary
factors in Alzheimer's Disease is very tenuous.

I judge these things based on a combination of several
factors including:

 Strength of evidence for a supplement (usually very weak)
 Evidence of the danger of a supplement.
 Cost.

Some supplements like vitamin D and E are potentially
dangerous at high doses.  I would require a great deal of
evidence for the value of such a supplement before I
took a high dose of it.

Some "supplements" like green tea and curry powder
are thought to be very safe because they've been used
by millions for hundreds of years without any _known_
ill effects.  They're also cheap.  I don't require as much
evidence for them before taking them.  However, even
with them I don't go overboard on dosages.

I also take ibuprofen.  The danger is probably higher than,
say, green tea or curried foods.  But the benefit seems
to be better documented.  However I just take low doses
of that too.

I'm probably just kidding myself, but taking some
supplements makes me feel like I'm doing _something_
to try to protect myself.

For what it's worth however, the things that I place most
of my hopes on are mental and physical exercise.  I
know they're good for me in many ways, possibly including
AD protection.  I don't know of any downside to them as
long as I don't hurt myself by overdoing it.

   Alan