- What It’s Used In: Mostly Hair Dyes and Dye Products
- Problems Caused: Asthma, Vertigo, Renal Failure, Convulsions, Tremors, Dermatitis, Coma
There are several versions of phenylenediamine, with both “O” and “M” being the two most commonly known. Pretty much all of them are bad for humans. These dangerous ingredients are used in most hair dyes, either semi-permanent or completely permanent. While the U.S. EPA has hesitated to call it carcinogenic, they have claimed that even short-term exposure could cause dermatitis, eye irritation, asthma, renal failure, vertigo, tremors, convulsions, and even comas. In animal studies, scientists found that they disrupted body weight. Clearly, these are dangerous ingredients we should not be using.