What do you call anything that can cause allergic reactions in you? For instance, when you drink soya milk, your body may react to having it. So, what is "soya milk" called confronting you? Or a particular brand's olive facial cream which can cause some problems to your skin after rubbing. The only word that comes to mind is allergic that according to the dictionaries it doesn't have such a connotation. I wonder if you let me know what do you call all the eatable/useable stuff that can cause such allergic reactions in you?
Example: Eggplant is a / an .......... vegetable to all people specially those who suffer digestive problems.
What adjective should I use to fill in the blank?