Lipstick Iced Iris vs Liquid Lipstick: which is safer?
Burt's Bees Lipstick Iced Iris is the clear pick. Sigma Beauty Liquid Lipstick carries a failing PFAS grade, and we never recommend buying a failing product.
Our pick
Burt's Bees
Lipstick Iced Iris
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleFragrance allergens and essential oils
PossibleFormaldehyde releasers and preservatives
PossibleRancidity and microbial growth in wax-oil base
Sigma Beauty
Liquid Lipstick
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleHeavy metals in pigments (lead, cadmium, chromium)
PossibleFormaldehyde releasers in preservative systems
PossibleFragrance allergens and undisclosed components
Where these two actually differ
- We flag Fragrance allergens and essential oils, Formaldehyde releasers and preservatives and Rancidity and microbial growth in wax-oil base on the Burt's Bees and not on the Sigma Beauty.
- We flag Heavy metals in pigments (lead, cadmium, chromium), Formaldehyde releasers in preservative systems, Fragrance allergens and undisclosed components and 1,4-dioxane contamination (from ethoxylated emulsifiers) on the Sigma Beauty and not on the Burt's Bees.
- The Burt's Bees is wax, oils, pigments (standard lip color base) where the Sigma Beauty is liquid pigment blend, waterproofing agents unspecified, which is most of the difference in these two grades.
- The gap is 45 points, wide enough that this is not a close call, and the Burt's Bees is the one to buy.
- We are less certain about the Sigma Beauty grade, at 45% confidence against 78%, because it discloses less.
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 lip balm & long-wear lipstick: see the full ranking