Eugène Perma · Trichodyn Prevention Shampoo
Three independent Greenlens lenses read the same 45 ingredients and land 0 points apart. That gap is not an error. Each lens asks a different question, and this page shows every answer, ingredient by ingredient, blended into nothing.
Our sources have reference data on 36 of 42 listed ingredients; 6 are uncharacterized in our data — a gap, not a clean bill. Our sources can only speak to ingredients they recognize — either flagged by an authority or known to be a common, well-characterized ingredient. An uncharacterized ingredient is a gap in our data, not a clean bill of health: a quiet safety scan over ingredients we can’t place is a weaker signal than one over ingredients we can.
Uncharacterized in our data: thyme, FLOWER, LEAF OIL, YELLOW 5, GREEN 5, F06.
Independent
The regulatory baseline. Follows EU cosmetic law: prohibited and restricted ingredients cost points, and allergen labelling is capped so it cannot tank a score on its own.
Flagged 17 of 45 ingredients: 2 prohibited, 4 restricted, 2 of concern, 9 regulated allergens.
Independent
The strict lens. Flags any ingredient with a listed hazard trait (SIN List, IARC, Prop 65), even when regulators still permit it.
Flagged 4 of 45 ingredients on hazard grounds: 1 carcinogen-linked, 1 reproductive-toxicant, 2 strong sensitizers.
Independent
The lenient lens. Trusts dose and regulation: permitted ingredients kept within their legal caps are tolerated, and only genuinely prohibited substances take a big hit.
Flagged 6 of 45 ingredients: 2 prohibited, 4 restricted (within-limit).
| Ingredient | Scan | Precautionary | Tolerance |
|---|---|---|---|
| Butylphenyl Methylpropional (Lilial)→EU Cosmetics Regulation Annex II (prohibited) | −55prohibited | −36reproductive | −50prohibited |
Coverage & match quality
9 ratings · 4 of 4 axes
The overall ring on the product page is the weighted mean of the four pillars using your weights, computed fresh on every visit and never stored. How each lens's reference lists were built, penalty by penalty, is on the methodology page.
← Back to Trichodyn Prevention Shampoo| −55prohibited |
| −12sensitizer |
| −50prohibited |
| DMDM Hydantoin→IARC carcinogen monographs; ChemSec SIN List (Substitute It Now) | · | −40carcinogen | · |
| ACID GREEN 25→EU Cosmetics Regulation Annex III (restricted) | −10restricted | · | −6restricted |
| CI 19140 / ACID YELLOW 23→EU Cosmetics Regulation Annex III (restricted) | −10restricted | · | −6restricted |
| LAURETH-9→EU Cosmetics Regulation Annex III (restricted) | −10restricted | · | −6restricted |
| POTASSIUM HYDROXIDE / SODIUM HYDROXIDE→EU Cosmetics Regulation Annex III (restricted) | −10restricted | · | −6restricted |
| Cocamidopropyl Betaine→ChemSec SIN List (Substitute It Now) | · | −12sensitizer | · |
| Fragrance / Parfum (undisclosed)→Common transparency/sensitization concern (not a regulatory ban) | −12concern | · | noted, 0concern |
| Fragrance / Parfum (undisclosed)→Common transparency/sensitization concern (not a regulatory ban) | −12concern | · | noted, 0concern |
| Benzyl Salicylate→EU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | −3allergen | · | noted, 0allergen |
| Coumarin→EU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | −3allergen | · | noted, 0allergen |
| Limonene→EU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | −3allergen | · | noted, 0allergen |
| Linalool→EU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | −3allergen | · | noted, 0allergen |
| Benzyl Benzoate→EU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
| Citral→EU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
| Citronellol→EU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
| Eugenol→EU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
| Geraniol→EU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
−N points subtracted by that lens, labelled with its concern · noted, 0 seen but tolerated under that philosophy · · not on that lens's reference lists. Open an ingredient for the full reasoning and every rater's position. 23 other ingredients matched no list at all.