I had an intolerance problem over many years.  Could not determine what
was wrong, because I would get "sick" every few years.  The severity of my
attacks gradually increased.

This took place over a 30 year period.  Then suddenly, the problem
intensified.
Gastroentrologist gave me all kinds of tests.  Finally figured that any
dairy product caused me to become severely ill.  After losing over 25 lbs.

I am intolerant to any kind of milk protein, not just lactose.  I might be
able to tolerate some butter, but am not going to try to find out.

Whey is deadly to me.  Fortunately, I do not have any other problems.
 Peanuts and soy do not bother me.  That is why I am sure that I have an
intolerance, as opposed to an Allergy

Simon W Hecht