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Every public rating on one cosmetic, the places they disagree kept visible, and a single score whose weighting you control.

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We never blend a score that hides who disagrees. Funding model travels with every rating. Weights are computed at read time and never stored.

Cosmetics only · lead with safetyProduct data from public sources incl. Open Beauty Facts & EWG Skin Deep · their ratings never scraped or shown

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hair biology — every product, every rater | Greenlens

Catalog/hair biology

HB

hair biology

23 products in the catalog

52Poor
avg. across 23 rated products · one axis, not the card composite: 23
products the raters split on

The average covers the ingredient-safety axis only, computed live from each product's raters — never a blended or stored brand score. Open a product to weight the axes yourself.

All products Conditioner 7 Hair Treatment Serum 5 Shampoo 9

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Best overall Worst overall Most contested A–Z

49
hair biology
Purple Shampoo
PoorOverall · your weights
6830
raters split 60–90
Data Not enough to score · 9/28
3 raters · split 60–90 on ingredient safety
EU Harmonised Classification (CLP Annex VI)Government90
ANSES Endocrine DisruptorsGovernment60
Cruelty-Free CertificationNonprofit30
44
hair biology
Strengthening Spray
PoorOverall · your weights
5830
raters split 42–90
Data Robust · 17/17
6 raters · split 42–90 on ingredient safety
Health Canada Ingredient HotlistGovernment85
EU Harmonised Classification (CLP Annex VI)Government90
Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent88
Cruelty-Free CertificationNonprofit30

Silver & Glowing Silver Shine Serum

hair biology

Silver & Glowing Silver Shine Serum

PoorOverall · your weights

5730

raters split 42–94

Data Robust · 13/13

5 raters · split 42–94 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government90
Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent94
Cruelty-Free CertificationNonprofit30

Argan Oil Taming Serum (2020 formulation)

hair biology

Argan Oil Taming Serum (2020 formulation)

PoorOverall · your weights

5730

raters split 42–100

Data Robust · 6/6

6 raters · split 42–100 on ingredient safety

Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent100
ANSES Endocrine DisruptorsGovernment80
ECHA SVHC Candidate ListGovernment80
Cruelty-Free CertificationNonprofit30

Vivid & Protected Sulfate Free Color Brilliance Shampoo

hair biology

Vivid & Protected Sulfate Free Color Brilliance Shampoo

PoorOverall · your weights

5730

raters split 42–100

Data Robust · 12/12

5 raters · split 42–100 on ingredient safety

Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent100
Health Canada Ingredient HotlistGovernment85
Cruelty-Free CertificationNonprofit30

Color Brilliance Shampoo for Gray Hair

hair biology

Color Brilliance Shampoo for Gray Hair

PoorOverall · your weights

5730

raters split 42–100

Data Robust · 12/12

5 raters · split 42–100 on ingredient safety

Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent100
Health Canada Ingredient HotlistGovernment85
Cruelty-Free CertificationNonprofit30

Long & Revitalized, Strengthening Shampoo

hair biology

Long & Revitalized, Strengthening Shampoo

PoorOverall · your weights

5630

raters split 42–100

Data Robust · 20/20

6 raters · split 42–100 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government90
Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent100
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

hair biology

Color Sealing Mask

PoorOverall · your weights

5530

raters split 42–100

Data Robust · 17/17

6 raters · split 42–100 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government80
Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent100
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

Volumizing Conditioner for Gray Hair

hair biology

Volumizing Conditioner for Gray Hair

PoorOverall · your weights

5530

raters split 42–100

Data Robust · 13/13

6 raters · split 42–100 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government80
Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent100
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

Full & Vibrant Volumizing Shampoo

hair biology

Full & Vibrant Volumizing Shampoo

PoorOverall · your weights

5530

raters split 42–94

Data Robust · 22/22

6 raters · split 42–94 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government90
Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent94
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

Soft & Hydrated Moisturizing Shampoo (2020 formulation)

hair biology

Soft & Hydrated Moisturizing Shampoo (2020 formulation)

PoorOverall · your weights

5530

raters split 42–94

Data Robust · 24/24

6 raters · split 42–94 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government90
Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent94
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

Full & Vibrant Volumizing Conditioner

hair biology

Full & Vibrant Volumizing Conditioner

PoorOverall · your weights

5530

raters split 42–100

Data Robust · 12/13

6 raters · split 42–100 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government80
Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent100
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

Soft & Hydrated Moisturizing Conditioner (2020 formulation)

hair biology

Soft & Hydrated Moisturizing Conditioner (2020 formulation)

PoorOverall · your weights

5430

raters split 42–88

Data Robust · 14/14

6 raters · split 42–88 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government80
Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent88
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

Long & Revitalized, Strengthening Conditioner

hair biology

Long & Revitalized, Strengthening Conditioner

PoorOverall · your weights

5430

raters split 42–88

Data Robust · 14/14

6 raters · split 42–88 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government80
Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent88
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

Volumizing Shampoo for Gray Hair

hair biology

Volumizing Shampoo for Gray Hair

PoorOverall · your weights

5430

raters split 42–94

Data Robust · 23/23

6 raters · split 42–94 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government80
Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent94
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

hair biology

Color Brilliance Conditioner

PoorOverall · your weights

5430

raters split 42–94

Data Robust · 13/13

6 raters · split 42–94 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government80
Greenlens Ingredient ScanIndependent62
Greenlens Tolerance ScreenIndependent94
Greenlens Precautionary ScreenIndependent42
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

Revitalize & Soothe

hair biology

Revitalize & Soothe

PoorOverall · your weights

5330

raters split 42–100

Data Robust · 26/26

7 raters · split 42–100 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government60
Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
ANSES Endocrine DisruptorsGovernment60
Greenlens Tolerance ScreenIndependent100
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

Silver & Glowing Conditioner

hair biology

Silver & Glowing Conditioner

PoorOverall · your weights

5230

raters split 42–82

Data Robust · 15/15

6 raters · split 42–82 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government80
Greenlens Ingredient ScanIndependent55
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent82
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

Purple Shampoo for Gray Hair

hair biology

Purple Shampoo for Gray Hair

PoorOverall · your weights

5230

raters split 42–82

Data Robust · 15/15

6 raters · split 42–82 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government80
Greenlens Ingredient ScanIndependent55
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent82
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

Thickening Treatment

hair biology

Thickening Treatment

HorribleOverall · your weights

4030

raters split 25–94

Data Robust · 10/10

5 raters · split 25–94 on ingredient safety

Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent94
ANSES Endocrine DisruptorsGovernment25
Cruelty-Free CertificationNonprofit30

Thickening Treatment (2020 formulation)

hair biology

Thickening Treatment (2020 formulation)

HorribleOverall · your weights

4030

raters split 25–94

Data Robust · 10/10

5 raters · split 25–94 on ingredient safety

Greenlens Ingredient ScanIndependent62
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent94
ANSES Endocrine DisruptorsGovernment25
Cruelty-Free CertificationNonprofit30

Purple Conditioner for Gray Hair

hair biology

Purple Conditioner for Gray Hair

HorribleOverall · your weights

3030

raters split 15–90

Data Robust · 21/22

6 raters · split 15–90 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government90
Greenlens Ingredient ScanIndependent15
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent25
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30

Silver & Glowing Shampoo

hair biology

Silver & Glowing Shampoo

HorribleOverall · your weights

3030

raters split 15–90

Data Robust · 21/22

6 raters · split 15–90 on ingredient safety

EU Harmonised Classification (CLP Annex VI)Government90
Greenlens Ingredient ScanIndependent15
Greenlens Precautionary ScreenIndependent42
Greenlens Tolerance ScreenIndependent25
Health Canada Ingredient HotlistGovernment55
Cruelty-Free CertificationNonprofit30