Roz Salt Scalp Scrub vs T/ Sal 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
Neutrogena
T/ Sal Shampoo
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleSalicylic acid skin irritation (concentration-dependent)
PossibleSulfur odor and contact dermatitis (sulfur sensitivity)
Possible1,4-dioxane or dioxane precursors in surfactants
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 Neutrogena.
- We flag Salicylic acid skin irritation (concentration-dependent), Sulfur odor and contact dermatitis (sulfur sensitivity) and 1,4-dioxane or dioxane precursors in surfactants on the Neutrogena and not on the Credo Beauty.
- The Credo Beauty is salt crystals, mineral-based scrub where the Neutrogena is aqueous shampoo base with salicylic acid and sulfur, 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