Avobenzone
parsol 1789 · butyl methoxydibenzoylmethane · hs 1800
A lipophilic UVA filter used in chemical sunscreens to absorb long-wave UV radiation. Systemic absorption exceeds the FDA safety threshold (0.5 ng/mL) after a single application, and avobenzone degrades in sunlight without photostabilizers, reducing its efficacy over the course of the day.
Concerns
- Systemic absorption exceeds FDA safety threshold of 0.5 ng/mL [Inference]
- Photodegrades in UV light — requires photostabilizers to maintain efficacy
- Rare photoallergy reactions reported in clinical literature
- May enhance skin penetration of co-formulated ingredients
Regulatory flags
- ⚑FDA proposed non-GRASE status (2019 — pending further safety testing)
- ⚑Degrades under UV exposure; often stabilized with octocrylene
Commonly found in
Safer swaps we'd look at
Thinksport
Thinksport SPF 50+
The cleanest mineral sunscreen we've found. Zero hormone disruptors.
Why it's cleaner
No flagged ingredients in our current review; key ingredients include Zinc oxide 20%, Sunflower seed oil, Shea butter.
Pipette
Pipette Mineral SPF 50
Sheer mineral SPF designed for sensitive skin.
Why it's cleaner
No flagged ingredients in our current review; key ingredients include Zinc oxide 20%, Squalane, Bisabolol.
Sources & references
Last researched: April 18, 2026
Research disclaimer: This rating is based on available peer-reviewed research and regulatory assessments at the time of publication. It is not medical advice. Consult a qualified professional for personal health or skin concerns.
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