Dieux Introduces Sun-Screener

Charlotte Palermino and Joyce de Lemos, co-founders of skincare brand Dieux, are tackling one of beauty’s most confusing and misunderstood categories: sunscreen. The clinical brand has introduced Sun-Screener, a free online tool designed to help consumers decode the ingredients in their SPF products and navigate the widespread misinformation surrounding sun protection, particularly the use of the term ‘mineral’.

Mineral sunscreens are often marketed as gentler alternatives to chemical formulas, making them a popular choice for those with sensitive skin, pregnant women, or consumers seeking reef-safe or natural options. Yet, despite their appeal, not all products labelled ‘mineral’ are created equal. Some rely on vague phrases like “mineral-based” or “enriched with minerals” while still leaning heavily on chemical UV filters. Others may feature zinc oxide or titanium dioxide in trace amounts, misleading consumers into believing the formula is exclusively mineral.

Enter Sun-Screener. By pasting an ingredient list into the online analyser, users receive a detailed breakdown of their sunscreen’s active components: whether it uses mineral or chemical filters (or both), which UV boosters are present, and what role each inactive ingredient plays. The tool also explains how each filter works, outlines its strengths and limitations, and notes whether it’s approved for use in the US or EU.

Developed in collaboration with cosmetic chemists Rebecca Perry and Ava Perkins, Sun-Screener draws from peer-reviewed data to provide insights into more than 35 UV filters, from zinc oxide and titanium dioxide to avobenzone and octocrylene. An accompanying glossary offers accessible explanations of sunscreen formulations, the distinction between mineral and chemical filters, and the types of UV radiation consumers need to be aware of.

Founded in New York City in 2020, Dieux combines expertise in brand strategy, cosmetic chemistry, and community building to deliver a science-driven, transparent approach to skincare. The brand champions rigorous clinical vetting, ethical sourcing, and vegan, cruelty-free practices, and is best known for its product transparency — breaking down each product’s formula, clinical testing, recyclability, and sustainability impact.

The brand’s bestsellers include the Instant Angel Moisturizer, a rich cream formulated to support skin recovery and maintain a healthy barrier, and the Forever Eye Mask, a set of lightweight, reusable patches that hold skincare products in place to enhance absorption and maximise results.

Sun-Screener is now available at dieuxskin.com.