I agree that there are no perfectly accurate medical tests for food
allergies.
I have had some luck identifying them with a practitioner of
kineseology.
But
that same practitioner "missed" some others that I seem to have.

There are several folks over on the Texas Lowcarb diet list doing a
stringent
elimination diet to identify food allergies.  One is a paleo eater.
Their
results have been truly astounding.  Different folks find they are
sensitive
to different foods.  Kathleen, one of the regular posters and a
participant
in
the elimination diet, summed it up this way yesterday on the list when
someone
asked her what to elminate:

"Everything.  You start out by eliminating EVERY SINGLE THING except
water.
Then you eat one food and one food only.  All of it you want but only
that
exact food.  For example beef, plain, unseasoned, unprocessed beef.
you eat
ONLY beef for a few days.  Do you lose weight and feel well?  It's a
safe
food, it you can keep.  Do you not lose weight do you not feel well?
You
PERMANENTLY eliminate it from your diet.

Move on to another food.  Test it.  Lather rinse repeat until you have
found
out which foods are keeping you fat.  Do not bother testing foods
which are
not low carb in the first place.  Those are no brainers, you can't eat
them.
But if you're not losing on low carb then it must be that one of the
low
carb
foods is an intolerance problem for you.  This will identify it."

Of course, Kathleen is talking weight loss here.  (And after a 9 month
stall,
she started losing weight very quickly once she identified her problem
foods--she's within 5 pounds of goal now!)  But if health problems are
the
issue, the same advice would apply.  Just substitute "elimination of
symptoms"
for "losing weight".

Adele