Head&shoulders · Classic Clean Shampoo
Three independent Greenlens lenses read the same 17 ingredients and land 40 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 15 of 17 listed ingredients; 2 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: blue 1, red 33.
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 2 of 17 ingredients: 2 of concern.
Independent
The strict lens. Flags any ingredient with a listed hazard trait (SIN List, IARC, Prop 65), even when regulators still permit it.
Flagged 3 of 17 ingredients on hazard grounds: 3 strong sensitizers. Score capped: a strong sensitizer is present.
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.
No prohibited or high-risk ingredients among 17; permitted ingredients tolerated.
These lenses disagree. A split of 40 points crosses our disagreement threshold (20). We keep every verdict and never average them; the table below is where the split comes from.
| Ingredient | Scan | Precautionary | Tolerance |
|---|---|---|---|
| Cocamidopropyl Betaine→ChemSec SIN List (Substitute It Now) | · | −12sensitizer | · |
| Fragrance / Parfum (undisclosed)→Common transparency/sensitization concern (not a regulatory ban) | −12 |
Coverage & match quality
7 ratings · 3 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 Classic Clean Shampoo| · |
| noted, 0concern |
| Methylchloroisothiazolinone→ChemSec SIN List (Substitute It Now) | · | −12sensitizer | · |
| Methylisothiazolinone→ChemSec SIN List (Substitute It Now) | · | −12sensitizer | · |
| Sodium Lauryl Sulfate→Common transparency/sensitization concern (not a regulatory ban) | −12concern | · | noted, 0concern |
−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. 12 other ingredients matched no list at all.