--- title: "Zinc oxide sunscreen" description: "Zinc oxide is a mineral UV filter; check the finished sunscreen's SPF, broad-spectrum claim and use directions." --- # Zinc oxide sunscreen > Zinc oxide is a mineral UV filter; check the finished sunscreen's SPF, broad-spectrum claim and use directions. Source: https://cosmetic-labs.com/glossary/zinc-oxide-sunscreen Created: 2026-11-09T08:50:46+00:00 Modified: 2026-11-09T09:56:07+00:00 Author: Emilie SCHOL ## Definition of Zinc oxide sunscreen Zinc oxide is a mineral UV filter used in sunscreens. Protection is established by testing the finished product, not merely by finding zinc oxide on its ingredient list. ### Learn more ## What is zinc oxide in sunscreen? Zinc oxide is an inorganic, often called mineral, ultraviolet-filter ingredient. In the United States, US over-the-counter sunscreen rules list zinc oxide at up to 25% under specified conditions. That ingredient listing does not itself assign an SPF to the finished sunscreen: M020 requires finished-product testing for SPF. In the European Union, Regulation (EU) 2016/621 added zinc oxide and zinc oxide (nano) as UV filters to Annex VI of the cosmetics regulation. It sets a 25% maximum in ready-to-use preparations, including a combined maximum when the two forms are used together. These are jurisdiction-specific permissions, not a promise that every product with zinc oxide performs identically. ## What do the nano and inhalation conditions mean? The EU regulation excludes applications that may lead to exposure of the user’s lungs by inhalation for both non-nano and nano zinc oxide. For the nano entry, its annex also specifies material characteristics, including purity, crystalline structure, particle-size distribution, water solubility and permitted coatings. The regulation’s recitals distinguish conclusions about specified particles after dermal application from concerns about inhalation in spray products. It would therefore be misleading to reduce the EU rule to either “all nano zinc oxide is banned” or “every nano product is approved.” The relevant form, specifications and mode of application matter. A percentage ceiling is a regulatory condition, not an instruction to choose the highest percentage or a proxy for a product’s measured SPF. ## What should the label establish? For a US sunscreen, look for its labeled SPF and, if claimed, Broad Spectrum designation. SPF is measured on a finished product by comparing UV exposure required for sunburn with and without the sunscreen. SPF mainly indicates protection against UVB-associated sunburn; a tested Broad Spectrum statement addresses UVA as well as UVB protection. Not every sunscreen is broad spectrum. A water-resistant claim likewise requires testing and identifies either 40 or 80 minutes of effectiveness while swimming or sweating; “waterproof” is not a valid substitute. Finding zinc oxide in the ingredient list alone tells you none of these tested finished-product values. For practical use, follow the package’s directions and apply enough to cover exposed skin. Reapply sunscreen at least every two hours, or more often when swimming or sweating, alongside shade and protective clothing. No sunscreen makes prolonged sun exposure risk-free. ## How do US and EU rules differ? In the US, sunscreen is regulated as a drug; the EU regulates sunscreen as a cosmetic subject to its UV-filter annex. Do not transplant a US Broad Spectrum label rule onto an EU package without checking the applicable local labeling standard. Also distinguish current US sunscreen rules from its 2021 proposal to revise that monograph: the proposal is not the complete set of current requirements. US sunscreen ingredient rules have changed since 2021, so an older ingredient list must not be treated as exhaustive or up to date. Those later changes do not alter the point that zinc oxide’s mere presence does not determine the measured protection of a particular formula. Compare [mineral sunscreen](/glossary/mineral-sunscreen/) as a category and [broad-spectrum sunscreen](/glossary/broad-spectrum-sunscreen/) as a finished-product protection claim. “Mineral” also does not guarantee an invisible finish on every skin tone. Sources ## Sources and references References supporting this page are listed below. Source access dates and supported claims are recorded in the evidence notes where available. [FDA OTC Sunscreen Monograph M020](https://www.accessdata.fda.gov/drugsatfda_docs/omuf/monographs/OTCMonograph_M020-SunscreenDrugProductsforOTCHumanUse09242021.pdf) URL [https://www.accessdata.fda.gov/drugsatfda_docs/omuf/monographs/OTCMonograph_M020-SunscreenDrugProductsforOTCHumanUse09242021.pdf](https://www.accessdata.fda.gov/drugsatfda_docs/omuf/monographs/OTCMonograph_M020-SunscreenDrugProductsforOTCHumanUse09242021.pdf) [Commission Regulation (EU) 2016/621, EUR-Lex](https://eur-lex.europa.eu/eli/reg/2016/621/oj/eng) URL [https://eur-lex.europa.eu/eli/reg/2016/621/oj/eng](https://eur-lex.europa.eu/eli/reg/2016/621/oj/eng) [FDA sunscreen regulatory actions Q&A](https://www.fda.gov/drugs/understanding-over-counter-medicines/questions-and-answers-fdas-regulatory-actions-over-counter-sunscreen) URL [https://www.fda.gov/drugs/understanding-over-counter-medicines/questions-and-answers-fdas-regulatory-actions-over-counter-sunscreen](https://www.fda.gov/drugs/understanding-over-counter-medicines/questions-and-answers-fdas-regulatory-actions-over-counter-sunscreen) [FDA: Sunscreen—How to Help Protect Your Skin from the Sun](https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun) URL [https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun](https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun) ### Other Mineral sunscreens ### [Titanium dioxide (sunscreen)](https://cosmetic-labs.com/glossary/titanium-dioxide-sunscreen) --- ## Site identity - Organization: Cosmetic Labs - Description: Cosmetic Labs is a directory and a platform to meet all your cosmetic product development needs. From sourcing raw material to finding the best CRO for your needs. - Website: https://cosmetic-labs.com