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Plant-based hair color certifications: what really guarantees 100% natural?
The word "organic" means nothing in cosmetics
Unlike food, the term "organic" is not regulated for cosmetics in France. Any brand can write "organic cosmetics" on its packaging without any official certification. For a plant-based hair color, this label alone offers no legal guarantee.
COSMOS Organic: the most demanding international standard
The COSMOS Organic certification is issued by an international consortium (Ecocert, BDIH, COSMEBIO, ICEA, Soil Association). It requires: a minimum of 95% ingredients of natural origin, at least 20% ingredients from organic farming, zero synthetic dyes, zero silicones, zero parabens, zero resorcinol. Every formula is audited every year by an independent third-party body. All Tresse Paris hair colors carry this certification.
Everything you need to know about the COSMOS Organic certification →
Ecocert: a certification body, not a single standard
Ecocert is a recognized French certification body — not a label in itself. It can certify against different standards: COSMOS Organic, COSMOS Natural, or less demanding specifications. Seeing "Ecocert certified" without the standard being specified says very little about the actual level of requirements.
OEDT and house labels: beware
Some brands display labels such as "OEDT certified" (tested free of endocrine disruptors) or in-house certifications. These labels are not audited by an accredited independent body and are not based on any enforceable ISO standard. They can be created and awarded by the brand itself.
How can you verify a certification?
A genuine COSMOS Organic certification is publicly verifiable in the Ecocert or COSMEBIO register. The certificate number appears on the packaging. If you cannot find this number, the certification is questionable.