Roz Salt Scalp Scrub vs Head Shoulders Classic Clean Dandruff Shampoo: which is safer?
Roz Salt Scalp Scrub is our pick: better on PFAS and on the overall hazard picture.
Our pick
Credo Beauty
Roz Salt Scalp Scrub
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleFragrance allergens or undisclosed fragrance components
ReportedMechanical irritation from crystal size and shape
Head & Shoulders
Head Shoulders Classic Clean Dandruff Shampoo
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
Possible1,4-dioxane (contaminant in surfactants)
ReportedHeavy metals in colorants or zinc pyrithione itself
PossibleFragrance allergens and undisclosed fragrance components
Where these two actually differ
- We flag Fragrance allergens or undisclosed fragrance components and Mechanical irritation from crystal size and shape on the Credo Beauty and not on the Head & Shoulders.
- We flag 1,4-dioxane (contaminant in surfactants), Heavy metals in colorants or zinc pyrithione itself and Fragrance allergens and undisclosed fragrance components on the Head & Shoulders and not on the Credo Beauty.
- The Credo Beauty is salt crystals, mineral-based scrub where the Head & Shoulders is aqueous shampoo formulation, surfactants, conditioning agents, which is most of the difference in these two grades.
- The gap is 25 points, wide enough that this is not a close call, and the Credo Beauty is the one to buy.
Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
More shampoo: see the full ranking