Thank you for trying EcoColors Haircolor. That's fantastic news! Please remember that allergies aren't to be taken lightly and just because you don't react, doesn't mean you might not in the future. Always do an allergy test according to kit instructions. Some allergies may develop over time with repeated exposure. Some allergies build a week after you color your hair. Just because EcoColors is p phenylenediamine (ppd) free, doesn't mean you won't react. There are other oxidative dyes present in nontoxic amounts that some individuals may be allergic to. Always have a medical plan in place with your physician in case you do experience any kind of allergic reaction.