Baking Soda Free Deodorant vs Outlast Invisible Solid Antiperspirant/Deodorant: which is safer?
Primally Pure Baking Soda Free Deodorant is our pick, better on PFAS and on the overall hazard picture.
Our pick
Primally Pure
Baking Soda Free Deodorant
PFAS grade
Excellent 100/100
Overall grade
Excellent 96/100
Verdict
Buy
Hazard flags
⚑ 1
Material
mineral-based powder blend (arrowroot, magnesium hydroxide, mica)
Confidence
82%
PossibleSkin irritation from magnesium hydroxide alkalinity
Secret
Outlast Invisible Solid Antiperspirant/Deodorant
PFAS grade
Excellent 75/100
Overall grade
Good 53/100
Verdict
Skip
Hazard flags
⚑ 4
Material
Stick composite (wax, starch, fragrance base)
Confidence
45%
PossibleFragrance allergens and contact sensitization
PossibleAluminum absorption via skin
ReportedFragrance-related respiratory or skin irritation in sensitive groups
Where these two actually differ
- We flag Skin irritation from magnesium hydroxide alkalinity on the Primally Pure and not on the Secret.
- We flag Fragrance allergens and contact sensitization, Aluminum absorption via skin, Fragrance-related respiratory or skin irritation in sensitive groups and PFAS in cosmetic emulsifiers or processing aids on the Secret and not on the Primally Pure.
- The Primally Pure is mineral-based powder blend (arrowroot, magnesium hydroxide, mica) where the Secret is Stick composite (wax, starch, fragrance 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 Primally Pure is the one to buy.
- We are less certain about the Secret grade, at 45% confidence against 82%, because it discloses less.
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 deodorant, see the full ranking