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Titanium dioxide is another ingredient found in mineral-based sunscreens. Sometimes it is used alone or in combination with zinc oxide for sun protection. Like zinc oxide, titanium dioxide coats the skin to create a barrier that absorbs and reflects UV rays to prevent deeper skin penetration and sun damage.3 The FDA also categorizes titanium dioxide as generally recognized as safe and effective (GRASE).2
The main difference is that titanium dioxide is only effective at protecting the skin from UVB and short-wave UVA rays. Zinc oxide can effectively block the entire spectrum of UVA and UVB rays, offering broad-spectrum protection needed to help prevent sun damage.
Zinc oxide is also less likely to penetrate the skin compared to titanium oxide.3
Tips For Using Zinc Oxide
To use zinc oxide creams safely and effectively, follow these tips:
Always apply to clean, dry skin.
Wash your hands before application.
When using zinc oxide creams to protect or dry irritated skin, gently apply a thin layer to cover the affected area and avoid rubbing.
If you’re applying zinc oxide sunscreen, apply roughly a shot glass-sized amount to cover the skin. Remember to apply it 15 minutes before sun exposure and reapply every two hours. If you’re swimming or sweating, you’ll need to reapply more frequently.9
Store zinc oxide products in a cool, dry place that isn’t directly in the sun.1
A Quick Review
Zinc oxide is considered a safe and effective mineral sunscreen ingredient. It is also a good way to protect irritated skin from diaper rash, poison ivy, and burns.
While there is some concern about zinc oxide nanoparticles, research has found they can’t significantly penetrate the skin and enter your bloodstream to cause negative health effects.
