Substance vulnerability

Includes a list of fictional characters who suffer from Substance vulnerability.

Substance vulnerability relates to a physical reaction when in the presence of a particular substance. This could be presented as a fatal vulnerability, such as when a Kryptonian comes into contact with Green kryptonite, or some other reaction, such an alteration to one's abilities, powers or mental faculties, or some form of a non-traditional allergy. Which is to say, characters who have a bad peanut allergy are not going to be categorized here.