> We have had both be wrong--but I would say the skin prick is a better indicator.

I understand that zero exposure can be a key to outgrowing an allergy.
However, doesn't a skin prick test itself constitute an exposure?

> All of them rely on a recent exposure--and if you are allergic to peanut or milk or whatever, and you have had zero exposure in years, your numbers could be low, but you could also be still quite allergic.

So how can one know when they are allergy free (or close enough so that an occasional "may contain milk ingredients" product will not trigger a reaction)?

Thanks.