74/100

Personal Care

Permanent Hair Dye

Low burden — Permanent Hair Dye is a relatively low-burden choice.

Oxidative permanent hair colour applied at home or salon.

The breakdown

Each driver rated 0 (none) to 10 (worst)

Chemical hazard
3
Everyday exposure
2
Persistence
2

Evidence strength: moderate · Detox Score = 100 − hazard×4.6 − exposure×3.4 − persistence×2.6, clamped 1–100.

What this means for you

A Detox Score of 74 places permanent hair dye in the Low band. None of the three drivers is severe, which keeps the burden manageable. Permanent dyes contain aromatic amines absorbed through the scalp. Spacing out applications and good ventilation reduce the dose.

Cleaner swap → Henna, semi-permanent dyes, or less frequent application in a ventilated space.
See where your whole exposure load is highest — free Exposure Score →

Frequently asked questions

Is permanent hair dye a toxic exposure?

Permanent Hair Dye has a Detox Score of 74 out of 100 (Low burden), which means it is a relatively low-burden choice. Permanent dyes contain aromatic amines absorbed through the scalp. Spacing out applications and good ventilation reduce the dose.

What is a safer alternative to permanent hair dye?

A lower-exposure swap for permanent hair dye is: Henna, semi-permanent dyes, or less frequent application in a ventilated space. Permanent dyes contain aromatic amines absorbed through the scalp. Spacing out applications and good ventilation reduce the dose.

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