From SPF to skin color, sunscreen’s effectiveness is complicated

Sunscreen functions as a sophisticated, high-tech material designed to protect against UV radiation, yet it remains an imperfect tool for public health. While the FDA recently approved Bemetrizinol—the first new active ingredient in over 25 years—to improve UV protection and cosmetic elegance, the U.S. market continues to lag behind international standards. SPF ratings often prove unreliable due to subjective testing methods, and the efficacy of these products is frequently compromised by environmental factors like sweat and sand. Furthermore, while the Nambour trial established a link between sunscreen use and reduced melanoma risk in white populations, evidence for people of color remains limited. Melanin provides significant natural protection against DNA damage, suggesting that blanket public health recommendations may require more nuanced, skin-type-specific strategies rather than universal application mandates.