Kiehl's Since 1851 Better Screen UV Serum Sunscreen SPF 50+
Lower concern; liquid serum sunscreen lacks waterproof coatings tied to PFAS.
Liquid sunscreen serums avoid water-repellency treatments that introduce PFAS. Kiehl's publishes no PFAS claims or third-party verification.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Water-based UV serum with mineral/organic UV filters
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
No PFAS disclosure
The company has not publicly discussed PFAS in this product.
Category baseline
cosmetics is a category where PFAS exposure is more common.
Fragrance allergens
Kiehl's formulas typically include fragrance; specific allergen content is not disclosed on product labeling. Water-based sunscreens are less occlusive than oils, reducing penetration depth, but sensitized individuals should patch-test on inner arm first.
Photodegradation and filter instability
Hybrid formulas can suffer reduced efficacy if avobenzone or other organic filters degrade under UV or heat. This product is designed with stabilizers to minimize this, but storage in direct sunlight or heat will reduce SPF performance over time; integrity cannot be visually verified without laboratory testing.
Contact dermatitis from mineral particles
Fine zinc oxide or titanium dioxide in a serum can irritate sensitive or compromised skin barriers. Risk is lower than in powder sunscreens, but individuals with eczema or rosacea should introduce gradually and monitor for redness or stinging.
What’s reassuring
Safe base material
Made from ceramic, mineral, or natural fiber with no PFAS risk.
Heavy metals
No recalls or safety warnings for this product. Organic chemical filters (avobenzone, octocrylene, etc.) do not bioaccumulate heavy metals; mineral filters (zinc/titanium) are well-regulated cosmetic ingredients with established safety limits in the EU and FDA.
Source: FDA ↗Contamination during product use
Water-based serums are less prone to bacterial growth than oil-based products if properly sealed. No product-specific contamination events are documented; standard cosmetic hygiene (avoid double-dipping, keep cap sealed) mitigates risk.
The full breakdown
What it's made of and why it matters
Kiehl's Better Screen UV Serum combines mineral UV filters (likely zinc oxide or titanium dioxide) with organic/chemical filters in a water-based serum matrix. This hybrid approach is designed to reduce the white cast typical of all-mineral formulas while maintaining broad-spectrum protection. Water-based delivery means no silicone or volatile organic solvents, reducing inhalation and skin barrier disruption risks common in oil-based sunscreens.
The brand's record and disclosure
Kiehl's (owned by L'Oreal) does not publicly disclose PFAS testing or a formal PFAS avoidance commitment, though the product architecture (water-based, no waterproof claims) suggests minimal PFAS contamination risk. The brand has no major documented recalls or regulatory warnings specific to this sunscreen line. Kiehl's maintains ingredient transparency on its website but does not independently certify products for heavy metals or fragrance allergens.
How it compares in its category
This serum sits in the mid-premium segment, competing with brands like EltaMD and CeraVe Face Lotion SPF 50. Unlike many chemical-only sunscreens, the hybrid filter system reduces photostability concerns; unlike many mineral-only options, it avoids the occlusive feel. Water-based serums generally pose lower endocrine disruption and skin sensitization risk than oil-based formulas, though individual filter choice matters more than vehicle type.
If you buy it
Apply at least one-quarter teaspoon to face and neck; reapply every two hours or after water exposure. Store in a cool, dry place away from direct sunlight to prevent filter degradation and separation. Water-based formulas are stable at room temperature for 12-18 months once opened; discard if texture becomes grainy or separation is visible. Use daily year-round; no special precautions needed beyond standard sunscreen hygiene (avoid contact with eyes, rinse thoroughly with water).
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Kiehl's has made none
Formulations change between production runs, so check the current label. How we grade.
Safer alternatives in Sunscreen
Goddess Garden
Natural Sunscreen SPF 30 6 oz
mineral-based UV filters, plant-derived waxes
Fragrance allergens and undisclosed fragrance components
Limited concern
Skin irritation or photosensitivity from plant oils
Limited concern
Lower-concern mineral sunscreen backed by credible PFAS-exclusion certification.
✓Verified PFAS-free by a third party
Raw Elements
Eco Formula SPF 30 Sunscreen
mineral sunscreen (zinc oxide, titanium dioxide)
Heavy metals
Limited concern
Photocatalytic activity of titanium dioxide in sunlight
Limited concern
Skin irritation or sensitivity to mineral film
Limited concern
Low risk. Mineral sunscreen backed by third-party verification, no fluorochemical history.
✓Verified PFAS-free by a third party
Raw Elements
Face & Body Sunscreen Tin SPF 30
mineral sunscreen (zinc oxide/titanium dioxide), tin packaging
Epoxy resin coating in tin lining
Limited concern
Fragrance allergens
Limited concern
Nano particle inhalation from loose powder form
Limited concern
Low risk. Mineral formula plus explicit PFAS-free stance and certs lower concern.
✓Verified PFAS-free by a third party
More sunscreen grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.