![]() Often times, non-nano zinc oxide can be the culprit for a white cast that’s left behind, especially for skin tones that are deeper or for skin that is very dry. We would be remiss if we didn’t talk about the tall tell sign of a non-nano zinc oxide sunscreen- the white cast. So, we want to ensure that the sunscreen active (zinc oxide) remains on top of the skin rather than being fully absorbed into the skin. Unlike chemical UV filters, such as oxybenzone, that get absorbed by the skin, zinc oxide (a physical UV filter) sits on top of the skin reflecting the sun damaging rays. Plus, it is the best choice to keep our coral reefs and marine life safe. Did you know that zinc oxide is the only UV filter for sunscreen approved by the FDA as a single ingredient that protects against both UVA and UVB rays? Other UV filters must be combined in order to be as effective as zinc oxide on its own. In addition, we’ve opted for uncoated, non-nano zinc oxide because the jury is still out of the potential for absorption of nanomaterials into the bloodstream. Wherever possible, we like to err on the side of caution, which is why we have opted for non-nano zinc oxide for our mineral sunscreens. ![]() We use zinc oxide as it is simply the most effective sunscreen active. To be classified as non-nano, particles must be larger than 100 nanometers. For reference, a nanoparticle is smaller than 100 nanometers (one billionth of a meter). It means that the zinc oxide particles are larger than 100 nanometers.
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