Roz Salt Scalp Scrub vs Custom: 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
Prose
Custom
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleFragrance allergens and undisclosed fragrance components
Possible1,4-dioxane contamination in surfactants
PossibleScalp or skin irritation from misformulation or preservative excess
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 Prose.
- We flag Fragrance allergens and undisclosed fragrance components, 1,4-dioxane contamination in surfactants and Scalp or skin irritation from misformulation or preservative excess on the Prose and not on the Credo Beauty.
- The Credo Beauty is salt crystals, mineral-based scrub where the Prose is custom formulated haircare (shampoo/conditioner base), 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