Zinc Oxide: Comedogenic Rating & Safety Profile
Also known as: ZnO · Mineral Sunscreen
A mineral UV filter that physically reflects and scatters both UVA and UVB light. The most pregnancy-safe and reef-safe sunscreen active.
Quick facts about Zinc Oxide
Safe
0 = won't clog pores · 5 = highly pore-clogging
Safe
0 = inert · 5 = often irritating
UV Filters
Generally considered safe
Typically yes
ZnO, Mineral Sunscreen
Quick verdict
Zinc Oxide is a uv filter with a safe comedogenic profile (0/5) and safe irritancy (0/5). A mineral UV filter that physically reflects and scatters both UVA and UVB light. The most pregnancy-safe and reef-safe sunscreen active.
What is Zinc Oxide?
Zinc oxide is a white, mineral powder (chemical formula ZnO) used as a physical UV filter in sunscreens. Unlike chemical UV filters that absorb UV energy, zinc oxide reflects and scatters both UVA and UVB light at the skin's surface. It is the only single sunscreen ingredient approved as truly broad-spectrum in most regulatory frameworks, including the FDA, EU and UK. It also has mild anti-inflammatory and antimicrobial properties and is the active ingredient in nappy rash creams worldwide.
Comedogenic Rating: What 0/5 Means for Your Skin
Zinc oxide is rated 0/5 comedogenic. The mineral particle does not penetrate intact skin or follicles, so there is no mechanism for pore-clogging. People sometimes blame mineral sunscreens for breakouts, but the cause is almost always the carrier oils, butters or silicones in the formula — not the zinc oxide itself. Look for lightweight gel or fluid mineral sunscreens if you are acne-prone.
Benefits for skin
- True broad-spectrum from a single ingredient
- Non-irritating and photostable
- Anti-inflammatory — helps calm redness
- Reef-safe and pregnancy-safe
Potential side effects & who should avoid it
Zinc oxide is one of the safest cosmetic actives. Allergy is essentially unknown. The main 'side effect' is the cosmetic white cast it leaves, especially on darker skin tones — this can be reduced by choosing formulations with smaller (micronised, but non-nano) particles, tinted versions or hybrid mineral-chemical sunscreens. It is the recommended sunscreen for babies, pregnant users, post-procedure skin and those with sensitive or rosacea-prone skin.
Best for
- All skin types
- Sensitive
- Rosacea
- Babies
- Post-procedure skin
Avoid if
No widely reported groups need to avoid this ingredient. Patch-test if you have a history of sensitivities.
How to use Zinc Oxide safely
Use a sunscreen with at least 10% zinc oxide for meaningful UV protection. Apply two finger-lengths to the face and reapply every 2 hours of sun exposure. Tinted versions blend more naturally on medium and deep skin tones than non-tinted formulas.
Commonly found in
Zinc oxide is in mineral sunscreens, tinted moisturisers, BB and CC creams, baby creams, calamine lotion, nappy rash treatments and post-procedure recovery balms.
Found Zinc Oxide in your skincare?
Paste the full ingredient list into our INCI Analyser to see how this ingredient interacts with everything else in the formula.
Frequently asked questions
Want the full picture on pore-clogging ingredients? Read our complete guide to comedogenic ingredients for the dermatology research behind the 0–5 scale and the full list of high-risk ingredients to avoid.
Sources
Written by ScanSkinAI Team · Last updated May 2026
This information is for educational purposes only. Always patch-test new products and consult a dermatologist if you have specific skin concerns.