Apple Cider Vinegar Shampoo vs Scalp Sync Clarifying Shampoo: which is safer?
Aveeno Apple Cider Vinegar Shampoo is our pick, better on PFAS and on the overall hazard picture.
Our pick
Aveeno
Apple Cider Vinegar Shampoo
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleSurfactant irritation (skin/eye contact)
PossibleFragrance allergens
PossibleMicrobial contamination (post-purchase)
Biolage
Scalp Sync Clarifying Shampoo
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleFragrance allergens and sensitizers
Possible1,4-Dioxane residual contamination
ReportedScalp or skin irritation from surfactant strength
Where these two actually differ
- We flag Surfactant irritation (skin/eye contact), Fragrance allergens and Microbial contamination (post-purchase) on the Aveeno and not on the Biolage.
- We flag Fragrance allergens and sensitizers, 1,4-Dioxane residual contamination and Scalp or skin irritation from surfactant strength on the Biolage and not on the Aveeno.
- The Aveeno is aqueous liquid shampoo (typical surfactants, conditioning agents, water) where the Biolage is water-based shampoo, no special coatings, which is most of the difference in these two grades.
- These two are level, close enough that price and fit should decide it rather than our grade.
Both products run through the same public rubric, which covers 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