Zinc Oxide
Reviewed by Emma · Last updated 14 Aug 2026
Also known as: ZnO, CI 77947
The physical blocker
Best For Skin Types
All skin types
Addresses
Effective Concentrations
10-25%
Usage Frequency
As directed on product packaging
EWG Safety Score
What Is Zinc Oxide?
Zinc oxide is a mineral compound that provides the most comprehensive physical sun protection available. It offers true broad-spectrum coverage, protecting against both UVA (ageing) and UVB (burning) rays across the entire UV spectrum.
Unlike chemical sunscreens that absorb UV rays, zinc oxide creates a physical barrier that reflects and scatters UV radiation away from the skin. This mechanism makes it photostable and less likely to cause skin irritation or allergic reactions.
Beyond sun protection, zinc oxide has soothing and anti-inflammatory properties that make it beneficial for sensitive, acne-prone, and rosacea-affected skin. It can help calm irritation and has mild antimicrobial effects.
Modern micronized and nano zinc oxide formulations significantly reduce white cast while maintaining protective efficacy. For best protection, apply liberally and reapply every 2 hours during sun exposure.
Benefits for Your Skin
Clinical Evidence & References
Zinc oxide benefits from extensive clinical support as a broad-spectrum physical sunscreen. It works by reflecting and scattering UVA and UVB radiation rather than absorbing it, making it inherently photostable and unlikely to degrade under sun exposure. This mechanism also reduces the risk of irritant and allergic reactions compared to chemical alternatives, particularly valuable for sensitive and acne-prone skin.
Beyond photoprotection, zinc oxide demonstrates established anti-inflammatory and mild antimicrobial properties that support skin barrier function and can help calm conditions such as rosacea and dermatitis. Modern micronized formulations maintain these benefits whilst minimising white cast. The evidence base is strengthened by decades of dermatological use and safety data, though individual tolerance and formulation efficacy vary, and application thickness affects protective performance in practice.
Published Research
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Zinc Oxide as a Broad Spectrum UV Filter J Am Acad Dermatol, 2014
How to Use
Safety & Precautions
Frequently Asked Questions
From the Clinic
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Take the skin quizOther forms of Zinc Oxide
These appear on ingredients lists under different names but are the same substance. Zinc Oxide is the common form.
Related Ingredients
Micronised Zinc Oxide
Fine particle mineral sunscreen for invisible protection
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4-Methylbenzylidene Camphor
A chemical UV filter that absorbs ultraviolet radiation to protect skin from sun damage
Articles About Zinc Oxide
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