Always Patch Test Hair Dye
Love your color? Here's why the patch test in the box matters every time.
Transcript
Always patch test hair dye. Here's why. Most permanent dark hair dyes use PPD, a well-known cause of allergic reactions. Resorcinol often comes with it, and can irritate skin too. The box includes a patch test for a reason. Do it every time. Between colors, a few drops of our Hair Oil on the ends help hair look smoother. Color with care.
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PPD and Resorcinol: Chemicals in Permanent Hair Dye
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Key points from the full guide
- PPD is a key ingredient in most permanent dark hair dyes and a well known cause of allergic contact dermatitis.
- Resorcinol is a common dye coupler that can irritate skin and has prompted questions about thyroid effects.
- US law lets coal tar hair dyes skip some safety rules if they carry a warning and patch test instructions.
- Research on hair dye and cancer is mixed, with some studies linking frequent permanent dye use to higher breast cancer risk.
- "Black henna" temporary tattoos often contain high levels of PPD and can cause severe reactions.
Read the full guide: PPD and Resorcinol: Chemicals in Permanent Hair Dye