Zinc Oxide
A mineral filter that sits on the skin's surface and mainly absorbs (and partly reflects) UV radiation to help shield the skin.
Zinc oxide is an inorganic mineral ingredient classified as a physical (sometimes called mineral) UV filter. Unlike chemical UV filters that absorb UV energy and convert it to heat, zinc oxide works by forming a layer on the skin's surface that mainly absorbs both UVA and UVB rays, while also scattering and reflecting a smaller amount. This broad-spectrum coverage is one of the reasons it's considered a cornerstone ingredient in sunscreen formulation.
In sunscreen products, zinc oxide is typically used at concentrations between 2% and 25%. Modern formulations often use micronised (finely milled) particles to reduce the white cast that older zinc oxide sunscreens were known for, though some residual tint can still occur, particularly on deeper skin tones. It's generally formulated into creams, lotions, and tinted bases, and works well alongside other UV filters like titanium dioxide. Because it sits on the skin rather than being absorbed into it, zinc oxide tends to be well tolerated by skin that leans sensitive or reactive.
For shoppers, zinc oxide sunscreens are worth considering if you prefer a mineral-based approach to UV protection, or if your skin doesn't get along well with certain chemical filters. It pairs nicely with antioxidant ingredients like vitamin E or niacinamide, which can support the skin's defence against environmental stressors. Applying it as the final step in your morning routine, over your moisturiser, gives it the best chance of forming an even protective layer.
A few honest caveats: zinc oxide on its own may not feel as cosmetically elegant as some newer chemical filter blends, and the white cast can be a genuine dealbreaker depending on your skin tone and the formulation. It also needs to be reapplied regularly, just like any sunscreen, as physical movement and sweat can displace it. If you're experiencing persistent skin concerns beyond everyday sun protection, consider speaking with a dermatologist or skincare professional for tailored guidance.
In sunscreen products, zinc oxide is typically used at concentrations between 2% and 25%. Modern formulations often use micronised (finely milled) particles to reduce the white cast that older zinc oxide sunscreens were known for, though some residual tint can still occur, particularly on deeper skin tones. It's generally formulated into creams, lotions, and tinted bases, and works well alongside other UV filters like titanium dioxide. Because it sits on the skin rather than being absorbed into it, zinc oxide tends to be well tolerated by skin that leans sensitive or reactive.
For shoppers, zinc oxide sunscreens are worth considering if you prefer a mineral-based approach to UV protection, or if your skin doesn't get along well with certain chemical filters. It pairs nicely with antioxidant ingredients like vitamin E or niacinamide, which can support the skin's defence against environmental stressors. Applying it as the final step in your morning routine, over your moisturiser, gives it the best chance of forming an even protective layer.
A few honest caveats: zinc oxide on its own may not feel as cosmetically elegant as some newer chemical filter blends, and the white cast can be a genuine dealbreaker depending on your skin tone and the formulation. It also needs to be reapplied regularly, just like any sunscreen, as physical movement and sweat can displace it. If you're experiencing persistent skin concerns beyond everyday sun protection, consider speaking with a dermatologist or skincare professional for tailored guidance.
