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Chemical Vs Physical Sunscreens
- Chemical sunscreens absorb UV rays and convert them into heat, while physical sunscreens reflect UV radiation away from skin.
- The primary ingredients differentiate them: physical contains zinc oxide or titanium dioxide; chemical includes avobenzone and oxybenzone.
Question Sunscreen Marketing Claims
- Avoid physical sunscreens claiming to be invisible on all skin tones; zinc and titanium dioxide inherently leave a white cast.
- Check sunscreen marketing critically, as terms like "reef safe" and "invisible" can be misleading.
US Sunscreen Ingredient Limitations
- The US is behind other countries in approved sunscreen ingredients, limiting access to advanced formulas.
- Popular brands abroad use chemical filters not yet FDA-approved in the US, impacting availability and formulation.