Mineral Sunscreen
Also known as: Zinc oxide sunscreen, Physical sunscreen
Uses zinc oxide or titanium dioxide to physically block UV instead of chemical filters that absorb into skin.
How it works
Mineral sunscreens work by different mechanisms than chemical filters:
Physical blocking: Zinc oxide and titanium dioxide particles sit on top of the skin and reflect/scatter UV radiation. They don't need to absorb into skin to work.
Chemical filters (avoided): Ingredients like oxybenzone, avobenzone, and octinoxate absorb UV radiation and convert it to heat. To do this, they must absorb into skin — studies detect them in blood within hours of application. Several are confirmed endocrine disruptors.
Oxybenzone specifically: Acts like oestrogen in the body, detected in 97% of Americans tested, linked to reduced sperm quality and altered hormone levels. Banned in Hawaii and Key West for coral reef damage.
The "white cast" issue: Older mineral formulas left visible white residue. Newer formulations use smaller particles or tinted bases. Some white cast is unavoidable but many modern options are minimal.
Uses
- -Daily sun protection
- -Face — look for non-comedogenic formulas
- -Sensitive skin — less irritating than chemical filters
- -Children — safer absorption profile
Why we recommend it
Chemical sunscreens are absorbed into bloodstream and many are endocrine disruptors. Mineral filters stay on skin surface.
Replaces / avoids
Caution
Reapply every 2 hours like any sunscreen. Check SPF rating.
Where to get it
Most brands now have mineral options. Check for zinc oxide or titanium dioxide as active ingredients.
Mid-range