Absolutely! Same with eggs. My daughter is EXTREMELY allergic to milk and eggs. They can cause her to go into anaphylactic shock and die within minutes (ask me how I know...).

And just like MSG, milk by-products do not have to be included in the ingredients although most mfg's do so now to keep from being sued. Whey is milk protein so it is even worse.
Also have to look for words like 'sodium caseianate' with also a milk protein used as a thickener.
I learned very early on to read labels (after being taught by my wife what to look for) and still do so to this day if I am fixing something for her to eat.


This thread has grown legs, it's wandering so much (but it's still informative!)

Tango