If you have previously had an allergic reaction to any hair dye product (our product or other brands like Just For Men, L'Oreal, etc.), then do not use hair dye products. The majority of hair dye products on the market (including ours) contain P-Phenylenediamine (PPD) and other ingredients that can cause allergies. You may be able to find some allergy-free products on the market that do not use ingredients like P-Phenylenediamine like some henna-based dyes; however, you should always consult with the manufacturers before using any product.
For more information about allergies to hair dye products, see our Allergy Testing & Safety page