Roz Salt Scalp Scrub vs MIELLE Rice Water Hydrating 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
Mielle Organics
MIELLE Rice Water Hydrating Shampoo
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleFragrance allergens and sensitizers
PossibleHeavy-metal contamination in botanical extracts
PossibleMicrobial contamination (growth during storage or after opening)
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 Mielle Organics.
- We flag Fragrance allergens and sensitizers, Heavy-metal contamination in botanical extracts, Microbial contamination (growth during storage or after opening) and Surfactant-related scalp or eye irritation on the Mielle Organics and not on the Credo Beauty.
- The Credo Beauty is salt crystals, mineral-based scrub where the Mielle Organics is aqueous shampoo (water, botanical extracts, surfactants), 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