The Future of Sunscreens: A Shift Away from Chemical UV Filters

Sunscreen science is undergoing a major transformation. As evidence grows around hormone disruption, systemic absorption, and environmental toxicity from certain chemical UV filters, regulators and brands are accelerating a shift toward mineral, non-nano zinc oxide — a UV filter with decades of safety data and global regulatory acceptance.

A Growing Regulatory Divide

Around the world, regulatory agencies have taken stronger action, reassessing older chemical filters, such as 4-MBC (4-methylbenzylidene camphor):

• European Union: Following a comprehensive safety review, the EU introduced a phase-out of 4-MBC in cosmetic products starting 1/5/2025, with a ban taking effect on 1/5/2026.

• United States: The FDA determined that 4-MBC does not meet GRASE standards for use in sunscreens.

• Global landscape: 4-MBC is now prohibited, restricted, or not approved across 109 countries and jurisdictions (as of August 2026), reflecting a broad and growing consensus built on toxicological and endocrine-disruption data.

  
  

Meanwhile, the TGA’s earlier position — set out in its 2005 internal file note advising no urgent action — has not kept pace with the decisions made in comparable regulatory environments. Australia still permits its use at up to 4%, including in children’s sunscreens.

4-MBC is only one example. Other chemical filters, such as oxybenzone, homosalate, and octocrylene are experiencing similar scrutiny. The direction of travel is clear: regulators in multiple jurisdictions are reassessing older chemical filters as new safety data becomes available.

Why Zinc Oxide Powder Is the Future of UV Protection

• As chemical filters face bans and restrictions, zinc oxide has emerged as the most secure, evidence-backed UV active for the next generation of sunscreens. Its advantages are increasingly aligned with both science and public expectations.

  
  

• Broad-Spectrum Coverage: Zinc oxide is among the few single UV filters that provide coverage across the full UVA and UVB range, including deep UVA1, the wavelengths most linked to melanoma and skin ageing

  
  

• Long Track Record: It remains on the skin's surface rather than being absorbed, has no evidence of endocrine activity in current research, and does not degrade into the breakdown by-products associated with some organic filters.

  
  

• Regulatory Stability Worldwide: Zinc oxide is permitted as a UV filter across major regulatory frameworks, including the FDA's GRASE monograph, the TGA's therapeutic goods listing, the EU's cosmetic ingredient annexes, and equivalent frameworks in Japan and the ASEAN region, giving brands a consistent regulatory basis to formulate for global markets.

  
  

• Consumer Trust and Market Momentum: Demand for mineral sunscreens continues to grow among parents, dermatologists, and health-conscious consumers, driven in part by preference for actives that remain on the skin's surface rather than being absorbed.

  
  

• A Forward-Looking Ingredient for Modern Formulation: As more chemical UV filters undergo safety reassessment, zinc oxide stands out as the only UV filter whose regulatory position is strengthening rather than weakening.

Technical Summary (Evidence-Based Overview)

4-MBC has been identified as an endocrine-active UV filter with documented effects on oestrogenic and thyroid pathways. It has been detected in human breast milk, confirming systemic absorption. After extensive safety evaluation, the European Union enacted a full ban through Commission Regulation (EU) 2024/996 of 3 April 2024, which states:

“From 1 May 2025 products containing that substance shall not be placed on the Union market. From 1 May 2026 cosmetic products containing that substance shall not be made available on the Union market.”

4-MBC has never been included among the FDA's GRASE-classified UV filters, meaning it is not authorised for use in US sunscreens. Globally, 4-MBC is now prohibited, restricted, or not approved across 109 countries and jurisdictions.

In contrast, non-nano zinc oxide remains permitted across all major regulatory jurisdictions, with a long-standing record of photostability and no evidence of endocrine activity in the current literature.

This evidence underpins zinc oxide's continued relevance as a stable, well-established option for next-generation sunscreen formulation

References

1.  European Commission. (2024). Commission Regulation (EU) 2024/996 of 3 April 2024 amending Regulation (EC) No 1223/2009 of the European Parliament and of the Council as regards the use of Vitamin A, Alpha-Arbutin and Arbutin and certain substances with potential endocrine disrupting properties in cosmetic products. Official Journal of the European Union, L(996), 1–8. http://data.europa.eu/eli/reg/2024/996/oj