We all want sunscreen that feels good and looks good. That’s why many brands advertise “clear” or “sheer” mineral sunscreens. But here’s the catch: if your mineral sunscreen goes on completely clear, there’s a good chance it’s made with nano-sized zinc oxide particles, and that’s something you may want to avoid.
What Are Nano Zinc Particles?
Zinc oxide is a natural mineral that protects your skin by sitting on the surface and reflecting UV rays. But to make it be less visible, some companies grind zinc down into extremely tiny particles smaller than 100 nanometers.
At first glance, that sounds great: no white cast, no chalky look. But when zinc is that small, it can behave very differently.
Why Nano Isn’t Better
-
Skin Penetration Concerns: While research is still developing, some studies suggest that nano-sized zinc may penetrate deeper into skin or hair follicles, especially if skin is damaged or broken.
-
Instability Under Sunlight: Nano particles have a much larger surface area, which means they can generate more free radicals when exposed to UV rays. That can lead to oxidative stress, the very thing sunscreen is supposed to prevent.
-
Environmental Impact: Nano particles may also act differently in the ocean, with potential risks for marine life that we don’t fully understand yet.
In other words: clear application might come with hidden costs.
SUNMUD’s Approach
At SUNMUD, we take a different path. Instead of relying on nano-sized zinc, we use non-nano zinc oxide blended with natural clays. The clay tint helps the sunscreen blend smoothly into skin tones without relying on nanoparticles. That means:
-
Safe mineral protection that stays on the skin’s surface where it belongs
-
Gentle, non-irritating formula even for sensitive skin
-
Eco-conscious choice that respects ocean life as much as your skin
The Bottom Line
If your mineral sunscreen goes on completely clear, you might want to think twice. It usually means it’s using nano-sized zinc particles and while it looks invisible now, the long-term effects on your skin and the planet are far less clear.
SUNMUD proves you don’t need to choose between performance and peace of mind. With our clay-based mineral formula, you get protection that works, a finish that flatters, and transparency you can trust.
Experience the difference yourself: Shop SUNMUD Sunscreen→
