Nano vs Non-Nano
Nano vs Non-Nano — a distinction based on particle size in mineral sunscreens, where nano particles measure under 100 nanometers and non-nano particles are larger. The size affects how transparent the product appears on skin, with non-nano formulas tending to leave more visible white cast while nano versions blend more sheerly.
Key points
- Nano particles are smaller than 100 nanometers, giving mineral sunscreens a lighter, less chalky finish.
- Non-nano zinc oxide and titanium dioxide are larger and often preferred by those seeking a more visible mineral barrier.
- Current evidence indicates nanoparticles in sunscreens do not penetrate healthy, intact skin into the bloodstream.
- Both types provide UV protection, and the choice is largely about cosmetic feel and personal preference.
Frequently asked
Are nano sunscreens safe to use?
Available research indicates that mineral nanoparticles remain on the skin's surface and do not penetrate healthy intact skin, though inhalation of loose sprays is best avoided.
Why do non-nano sunscreens leave a white cast?
Larger non-nano mineral particles scatter more visible light, which produces the characteristic white appearance on the skin.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
