How Chemical vs Mineral Filters Work
How Chemical vs Mineral Filters Work — chemical and mineral filters are the two main categories of sunscreen actives that protect skin through different mechanisms. Chemical filters absorb UV radiation and convert it to heat, while mineral filters like zinc oxide and titanium dioxide primarily sit on the skin to scatter and absorb UV rays.
Key points
- Chemical filters such as avobenzone absorb ultraviolet energy and dissipate it as heat.
- Mineral filters use zinc oxide or titanium dioxide to reflect and absorb UV at the surface.
- Mineral formulas begin working on application, while chemical filters need time to absorb.
- Mineral filters are often chosen for sensitive skin because they tend to be less irritating.
- Many modern sunscreens combine both types to balance protection, texture, and finish.
Frequently asked
Are mineral sunscreens better than chemical ones?
Neither is universally better; mineral filters suit sensitive skin and work immediately, while chemical filters often feel lighter, so the best choice depends on skin type and preference.
Do mineral sunscreens only reflect UV?
Reflection is part of how they work, but zinc oxide and titanium dioxide also absorb a significant portion of ultraviolet radiation.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
