Head&shoulders
Classic Clean Shampoo
Shampoo700mlGTIN 0056100020561
Raters split
Ingredient safety
A 40-point gap between the two loudest voices.
60Greenlens Precautionary ScreenIndependent
vs100Greenlens Tolerance ScreenIndependent
050100
See why, ingredient by ingredientCleaner options
See 12 cleaner alternatives
Same category, ranked by ingredient safety, never by affiliate payout.
Every rater, every axis
Ingredient safety
Split · 40 pts apart- 100
- 76
- 60
- 90
- 70
Lowest 60 · highest 100 · gap 40
Also screened — no listing found
Environmental
Also screened — no listing found
Labor
- 30
Packaging
- 46
Coverage & match quality
7 ratings · 3 of 4 axes
- Some ratings rest on an automatic match that has not been human-reviewed.
- Fewer raters reach smaller-brand products, so a missing rating is not a clean bill of health, only a gap.
no black box
How this score is built
no black box
How this score is built
We don't rate products ourselves. We collect what each public rater already says, put every scale on common ground, and keep the disagreements visible instead of averaging them away.
- 1
Collect each rater's own score
Every source keeps its native verdict for this product. We never invent a score for an axis a source didn't measure.
- 2
Normalize to 0–100, higher = better
Raters can use different scales and directions: some where a low number means safe, some where a high one does. We map them all onto one 0–100 axis and flip the ones that run backwards so the numbers are finally comparable.
- 3
Average per axis, but keep the spread
Scores on the same axis become one representative number (their mean). When raters split by 20+ points we flag it and keep every rater's number. A disagreement is never blended into silence.
- 4
Your weights make the overall
The ring is the weighted average of the four pillars using your weights. It's computed fresh every time and never stored, so there's no hidden “objective” default.
worked example · Ingredient safety
- Greenlens Tolerance Screen100 on 0–100100
- Greenlens Ingredient Scan76 on 0–10076
- Greenlens Precautionary Screen60 on 0–10060
- EU Harmonised Classification (CLP Annex VI)90 on 0–10090
- Health Canada Ingredient Hotlist70 on 0–10070
Average of 100 · 76 · 60 · 90 · 70pillar70
Raters split here, so this 70 is a midpoint, not a consensus. The spread stays on the “every rater” list above.
Why the safety score
Greenlens Ingredient Scan
Independent · EU regulatory reference
76/100
Flagged 2 of 17 ingredients: 2 of concern.
- Sodium Lauryl SulfateCommon transparency/sensitization concern (not a regulatory ban)−12
- Fragrance / Parfum (undisclosed)Common transparency/sensitization concern (not a regulatory ban)−12
Starts at 100; 15 other ingredients carried no recognized regulated hazard. Absence of a flag means no regulated hazard was recognized — not proof of safety. This is one lens; see where raters disagree above.
Why this score
Every ingredient, under all three lenses
The Scan is one opinion. The strict and lenient lenses read the same list and land 40 points apart. See what each one flags, and what it costs.
Weighted by what you care about
Tune your weights
composite recomputes live
+
1.0×
Environmentalno rating
No rater covers this axis for this product, so its weight can't move the score.
1.0×
1.0×
0 means ignored. Higher = more weight in your composite.
Flagged ingredients
Ingredients, decoded
Data availability
Robust15 of 17 characterized
Our sources have reference data on 15 of 17 listed ingredients; 2 are uncharacterized in our data — a gap, not a clean bill.
| Ingredient | What it does | Safety | Data |
|---|---|---|---|
| Waterantiplaqueskin conditioningsolvent | antiplaqueskin conditioningsolvent | No flags in our sources | Well-characterized |
| sodium lauryl sulfatecleansingdenaturantfoaming | cleansingdenaturantfoaming | Transparency concern· flagged by 1 of 9raters disagree | Referenced |
| sodium laureth sulfatecleansingfoamingsurfactant - cleansing | cleansingfoamingsurfactant - cleansing | No flags in our sources | Well-characterized |
| glycol distearateemollientopacifyingsurfactant - emulsifying | emollientopacifyingsurfactant - emulsifying | No flags in our sources | Well-characterized |
| zinc carbonateopacifying | opacifying | No flags in our sources | CosIng-catalogued |
| sodium chloridefragranceoral carebulking | fragranceoral carebulking | No flags in our sources | Well-characterized |
| sodium xylenesulfonatesurfactant - hydrotrope | surfactant - hydrotrope | No flags in our sources | Well-characterized |
| cocamidopropyl betaineantistaticcleansinghair conditioning | antistaticcleansinghair conditioning | Strong contact sensitizer· flagged by 1 of 9raters disagree | Referenced |
| fragrance | Transparency concern· flagged by 1 of 9raters disagree | Referenced | |
| dimethiconeemollientantifoamingskin conditioning | emollientantifoamingskin conditioning | No flags in our sources | Well-characterized |
| sodium benzoatepreservativefragranceanticorrosive | preservativefragranceanticorrosive | No flags in our sources | Well-characterized |
| guar hydroxypropyltrimonium chloridefilm formingantistaticskin conditioning | film formingantistaticskin conditioning | No flags in our sources | CosIng-catalogued |
| magnesium carbonate hydroxidebindingbufferingbulking | bindingbufferingbulking | No flags in our sources | CosIng-catalogued |
| methylchloroisothiazolinonepreservative | preservative | Strong contact sensitizer· flagged by 2 of 9raters disagree | Referenced |
| methylisothiazolinonepreservative | preservative | Strong contact sensitizer· flagged by 3 of 9raters disagree | Referenced |
| blue 1 | Not in our sources | No data | |
| red 33 | Not in our sources | No data |