Cottage cheese also works for me. I don't know why. I figure
it's the protein but I don't know, yet Milk is something I don't
drink because it bothers me [except Lactaid]. I don't know what
works for most people honestly. In your situation, I'd go with
the recommendations but also experiment as well. Notice how you
react to different foods and drinks. Taking notes about yourself
as you eat (something like a "reaction journal" is probably the
strongest step you can take along with gathering whatever
outside education you can find. A "how I react" journal could be
like an "anti-shopping list".