DEVA INSIGHTS & INDUSTRY NEWS

"Full-Spectrum Sun Protection" — A Claim Being Overused Open any sunscreen product page in 2026, and claims like "full-spectrum protection," "blocks 99% of UV rays," or "blue light defense" are everywhere. But where do these numbers come from? What methods were used to measure them? Are the testing standards behind them consistent? These questions rarely receive answers on most brands' promotional pages. In February 2026, the Cosmetic Evaluation Center of China's National Med

Shake Before Use—But Why Does Your Sunscreen Still Separate? Open a bottle of sunscreen and find clear liquid on top, white sediment at the bottom; or shake to mix, let sit for 20 minutes, and it separates again. This isn't just an appearance issue—once an emulsion layers, sunscreen actives become severely unevenly distributed. Consumers applying the product may scoop only the high-aqueous phase (no sunscreen) or high-oil phase (excessive sunscreen concentration), leading to

Not All "Physical + Chemical Blends" Equal "Better Protection" "Physical + chemical hybrid sunscreens" are currently the mainstream formulation strategy in the market, marketed by brands as "balancing safety and high efficiency." But a rarely mentioned truth is: not all physical and chemical filters can coexist peacefully—there are real mutual interference mechanisms, and improper formulation can cause protection efficacy to drop instead of rise. Understanding these interfere

Behind "AM C, PM A": Why Must Retinol Avoid Daytime Use? "AM C, PM A" (Vitamin C in the morning, Retinol at night) is the most widely recognized skincare mantra in recent years—vitamin C in the morning (antioxidant + brightening), retinol (A-alcohol) at night (promotes cell renewal + anti-aging). This time-segmented strategy is backed by precise formulation science, not merely experiential wisdom. The conflict between retinol and UV radiation exists on three levels: Retinol i

Why Do We "Know We Should Reapply" But Simply Can't? Dermatologists repeatedly emphasize: sunscreen needs to be reapplied every 2 hours. Yet in reality, the vast majority of people never reapply after leaving home—not because they're lazy, but because the reapplication process for cream-type sunscreens is too cumbersome: wipe face, reapply sunscreen, reapply makeup. This entire sequence is simply impossible to execute on a subway or in an office. This pain point has catalyzed

Why Does Sunscreen Film Fail After Exercise? After a run, touching your face reveals that the once-uniform sunscreen film has been washed into "stripes" by sweat; after swimming, skin has already started to redden; after two hours of cycling, it feels like nothing is left on your face—behind these experiences lies the systemic failure of sunscreen film in the face of sweat and mechanical friction. Sunscreen failure in sports scenarios isn't caused by a single factor. Sweat at

Every Summer, Skincare Communities Flood With Similar Help Requests After applying sunscreen, the face feels burning, stinging, and red—relief only comes after washing it off. This isn't mysticism or psychological effect; it's because the formulation contains ingredients your skin cannot process. An Underestimated Large Population Sunscreen stinging is, first and foremost, a sensitive skin issue. The 2025 China Sensitive Skin Care Market Research Report shows that the proport

Every Summer, Applying Sunscreen to a Child's Face Triggers Tears—A Familiar Scene for Many Parents A tube of sunscreen applied to a child's face, followed immediately by crying—this is a scenario many parents know well. Eye stinging isn't the child being "difficult"; it's a problem with the formulation itself. In the children's sunscreen category, "tear-free formula" may seem like mere marketing language, but behind it lies a genuine formulation chemistry challenge. A Rapidl

Why Does Sunscreen Still Feel Sticky After Application? After applying sunscreen, three minutes pass—and your face still feels tacky. It sticks to clothing, smudges phone screens, and the excessive tackiness even interferes with subsequent makeup application. This experience has led many people to develop a counterproductive habit: applying foundation before the sunscreen has fully set, resulting in pilling. "Slow film formation" isn't mysticism—it's determined by the volatil