Zinc Oxide

Mineral UV FilterAnti-inflammatory

Also known as: ZnO

Description

Zinc oxide is an inorganic (mineral) broad-spectrum UV filter that provides protection against both UVA and UVB radiation. It is one of only two FDA Category I sunscreen actives classified as GRASE (Generally Recognized as Safe and Effective), the other being titanium dioxide. Beyond photoprotection, zinc oxide has well-documented anti-inflammatory, antimicrobial, and wound-healing properties, making it particularly suitable for sensitive, acne-prone, and rosacea-affected skin. It is available in both micronized and non-nano forms to improve cosmetic elegance while maintaining safety. [Smijs 2011] [Gupta 2014]

Mechanism of Action

Zinc oxide protects against UV radiation primarily through reflection and scattering of UV photons, along with absorption of UV energy by zinc oxide particles. It provides broad-spectrum coverage from 290–380 nm, with particularly strong UVA protection compared to most organic filters. Upon skin application, zinc ions released from ZnO exert anti-inflammatory effects by inhibiting NF-κB signaling and reducing pro-inflammatory cytokines (IL-1α, IL-6, TNF-α). Antimicrobial activity is attributed to generation of reactive oxygen species on the particle surface and direct disruption of bacterial cell membranes. Zinc also supports wound healing by promoting keratinocyte migration and collagen synthesis. [Schneider 2019]

Indications

  • Broad-spectrum UV protection [Smijs]
  • Sensitive skin sun protection [Schneider]
  • Acne-prone skin sun protection [Gupta]
  • Rosacea-prone skin sun protection
  • Diaper dermatitis
  • Minor wounds and skin irritation
  • Anti-inflammatory skin protection

Available Concentrations

2%5%10%15%20%25%

Side Effects

  • White cast (especially in higher concentrations and darker skin tones) [Smijs]
  • Dryness with prolonged use [Schneider]
  • Rare contact dermatitis
  • Potential comedogenicity at very high concentrations in some formulations

Contraindications

  • Known hypersensitivity to zinc oxide (very rare)
  • Inhalation risk with powder formulations (avoid aerosolized application)

Pregnancy Category

FDA Category I sunscreen active (safe — minimal systemic absorption)

Found In

Cosmetics containing Zinc Oxide

Aqualogica Illuminate+ Dewy Sunscreen SPF 50+ PA++++AqualogicaBioderma Photoderm Mineral SPF 50+ PA++++BiodermaThe Derma Co 1% Hyaluronic Long Lasting Sunscreen SPF 50 PA++++The Derma CoThe Derma Co 1% Hyaluronic Sunscreen Aqua Gel SPF 50 PA++++The Derma CoThe Derma Co Ultra Light Zinc Mineral Sunscreen SPF 50 PA+++The Derma CoFixderma Shadow Sunscreen SPF 50+ Gel PA+++FixdermaLa Shield Expert Urban Protect Sunscreen SPF 50 PA+++La Shield (Glenmark)La Shield Fisico Matte Sunscreen Gel SPF 50+ PA+++La Shield (Glenmark)La Shield Pollution Protect SPF 50 Mineral Sunscreen Gel PA+++La Shield (Glenmark)Lakme Sun Expert Tinted Sunscreen SPF 50 PA+++LakmeRe'equil Ultra Matte Dry Touch Sunscreen Gel SPF 50 PA++++Re'equilSuncros Matte Finish Soft Lotion SPF 50+ PA+++Sun Pharma (Suncros)UV Doux Gold Silicone Sunscreen Gel SPF 50 PA+++UV Doux (Brinton Pharmaceuticals)UV Doux Silicone Sunscreen Gel SPF 50 PA+++UV Doux (Brinton Pharmaceuticals)Venusia Max Intensive Moisturising CreamDr. Reddy's Laboratories

Related Conditions

Acne Vulgaris Non-comedogenic UV filter with antimicrobial and anti-inflammatory properties — suitable for acne-prone skin photoprotection Rosacea Gentle mineral sunscreen — provides UV protection without chemical filter irritation, with added anti-inflammatory benefit Photoaging Broad-spectrum UV filter — prevents cumulative photodamage through UVA and UVB protection Atopic Dermatitis Skin protectant — provides UV protection with anti-inflammatory and barrier-protective properties for sensitive eczematous skin

References

  1. Gupta M, Mahajan VK, Mehta KS, et al. "Zinc therapy in dermatology: a review." Dermatol Res Pract, 2014. doi:10.1155/2014/709152
  2. Schneider SL, Lim HW. "A review of inorganic UV filters zinc oxide and titanium dioxide." Photodermatol Photoimmunol Photomed, 2019. doi:10.1111/phpp.12439
  3. Smijs TG, Pavel S. "Titanium dioxide and zinc oxide nanoparticles in sunscreens: focus on their safety and effectiveness." Nanotechnol Sci Appl, 2011. doi:10.2147/NSA.S19419

Limitations

This page provides a general overview of Zinc Oxide in dermatology. It does not cover every possible use, formulation, or interaction. Individual responses to compounds vary — what works for one person may not work for another. Always consult a qualified dermatologist before starting or changing any treatment.