Roz Salt Scalp Scrub vs Hair Moisture Rich Curl 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
Excellent 100/100
Overall grade
Excellent 86/100
Verdict
Buy
Hazard flags
⚑ 2
Material
salt crystals, mineral-based scrub
Confidence
82%
PossibleFragrance allergens or undisclosed fragrance components
ReportedMechanical irritation from crystal size and shape
Kristin Ess
Hair Moisture Rich Curl Shampoo
PFAS grade
Excellent 75/100
Overall grade
Poor 47/100
Verdict
Buy
Hazard flags
⚑ 4
Material
Aqueous surfactant blend (shampoo base)
Confidence
72%
PossibleFragrance allergens (undisclosed components)
ReportedSulfates (SLS/SLES) irritation risk
PossibleSilicone buildup with repeated use
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 Kristin Ess.
- We flag Fragrance allergens (undisclosed components), Sulfates (SLS/SLES) irritation risk, Silicone buildup with repeated use and Eye irritation (sulfates and surfactants) on the Kristin Ess and not on the Credo Beauty.
- The Credo Beauty is salt crystals, mineral-based scrub where the Kristin Ess is Aqueous surfactant blend (shampoo 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