Huh. It never occurred to me that vitamins could be allergens, but why the hell not? Do you have problems with sunlight, or does your body process that in a different way?

Is there some other source you can find for whole milk without additions? I just got a yogurt maker and have used it twice, and like it a lot, so if you had some decent milk, it would be nice. (Though mine says you can use soy milk, too. It just has to contain certain things. I can get the booklet and tell you, if you're interested.)