Sunscreen Ranker journal
The sunscreen
journal.
Daily, evidence-led notes on SPF, UV filters, and sun protection — every claim sourced, no cap.
- Kids & family Florida Made Sunscreen Permanently Tax-Free in 2025 Starting August 1, 2025, Florida families no longer pay the 6% state sales tax on sunscreen, year-round, and the savings add up over a summer. Read it →
- UV science What Actually Happens Inside Your Skin During a Sunburn A sunburn isn't just surface redness; it's your skin detecting damaged DNA and ordering ruined cells to self-destruct before they turn cancerous. Read it →
- Sensitive skin Sunscreen Allergy Is Real: How a Photopatch Test Finds the Culprit If your sunscreen stings, itches, or breaks you out, it may not be 'sensitive skin' at all but a true allergy a photopatch test can pinpoint. Read it →
- Seasonal When Is UV Strongest? The 10 a.m.-4 p.m. Window and Solar Noon Explained UV peaks around solar noon, not whenever it feels hottest - here's how to time your outdoor plans around the strongest hours. Read it →
- Global Why Australia Has the World's Strictest Sunscreen Rules In the country with the world's highest skin-cancer rates, sunscreen is regulated like medicine - here's why 'Australian standard' is a real selling point. Read it →
- Trends Benzene in Sunscreen: What the Viral Recall Headlines Actually Mean 'There's a carcinogen in your sunscreen' makes a great headline - here's the real story behind the benzene recalls, without scaring you off SPF. Read it →
- Application Dark Skin Needs Sunscreen Too: Debunking the 'Melanin Is Enough' Myth Melanin helps, but the darkest skin tones only get the equivalent of about SPF 13 - and the survival gap in melanoma makes the rest of the case. Read it →
- Skin cancer Skin Cancer in Skin of Color: Why Darker Tones Still Need Protection Darker skin is not immune to skin cancer - it's often diagnosed later and in places people never think to check, like the palms and soles. Read it →
- Formulation Are Nano Zinc & Titanium Dioxide Safe? What Penetration Studies Show The fear that nanoparticles slip into your bloodstream is widespread - here's what the actual penetration studies, including a major regulatory review, found. Read it →
- UV science The 'Base Tan' Myth: Why Pre-Tanning Equals Only About SPF 3 That pre-vacation 'base tan' you build to avoid burning is worth about SPF 3 - and it's already DNA damage you can't undo. Read it →
- Kids & family Massachusetts Is Still Fighting to Let Kids Use Sunscreen at School and Camp In summer 2025, Massachusetts kids still couldn't apply sunscreen at school or camp without a doctor's note - here's the bill trying to change that. Read it →
- Sensitive skin AHAs, Salicylic Acid & Sun Sensitivity: Why the FDA Says Wear SPF The exfoliating acids that clear your skin also make it easier to burn - and the FDA put that warning right on the label. Read it →
- Seasonal UV Index vs. Temperature: Why a Cool Day Can Still Torch Your Skin Your skin doesn't read the thermometer - here's why a crisp 60-degree afternoon can carry a sunburn-grade UV Index. Read it →
- Global EU UVA-Circle Logo vs. US 'Broad Spectrum': Which Is Stricter? A US product can say 'broad spectrum' and still offer far weaker UVA protection than an EU sunscreen wearing the UVA-in-a-circle logo - here's why. Read it →
- Trends Why Is U.S. Sunscreen 'Behind'? How Drug Regulation Changed Everything The viral 'American sunscreen sucks' takes skip the real reason - the FDA regulates SPF as a drug, and that changes everything. Read it →
- Application Do You Need Sunscreen Indoors? UVA Through Windows, Explained If you sit by a window or commute by car, the glass blocking your sunburn isn't blocking the rays that age your skin - here's the fix. Read it →
- Formulation Beyond UV: Why 2025 Research Says Sunscreens Should Fight Blue Light and Infrared Sun protection is expanding past UVA and UVB - a 2025 scientific review explains the blue-light and infrared gap your 'broad spectrum' label doesn't cover. Read it →
- Filter chemistry Korea's Watchdog Flags 4-MBC in Popular Sunscreens (July 2025) Korean sunscreens dominate global wishlists, but a July 2025 domestic audit shows even legal filters can hide EU-flagged concerns - here's how to read the label. Read it →
- Makeup + SPF Why SPF in Your Foundation Is Only About 1% Sun-Blocker (CU Anschutz, 2025) Here's the exact reason your SPF foundation underdelivers, straight from a cancer center: the protective active is a tiny fraction of the formula, and you'd never apply enough. Read it →
- Trends Indie SPF in 2025: Australia-Approved Filters and Melanin-Friendly Formulas The 2025 indie SPF boom is chasing two things U.S. legacy brands lag on — next-gen filters available abroad and formulas built for deeper skin tones. Read it →
- Skin cancer How to Do a Monthly Skin Self-Exam at Home (Head-to-Toe Checklist) Turn the vague advice to 'watch for changes' into a real monthly routine — including the scalp, soles, and other spots people miss. Read it →
- Formulation Iron Oxides in Tinted Sunscreen: The One Common Ingredient That Blocks Visible Light If you have melasma or stubborn hyperpigmentation, the tint in your sunscreen isn't just makeup — it's the part that fights visible light. Read it →
- Seasonal Climate Change Tripled the Toll of Europe's Late-June 2025 Heatwave, Study Finds The same atmospheric setups that turn deadly in heatwaves also deliver peak UV — context for treating extreme-heat days as both a heat-safety and a sun-safety emergency. Read it →
- Application The Lab Behind the SPF Scandal: Doubts Over Princeton Consumer Research's 'Too Perfect' Results SPF numbers are only as trustworthy as the lab behind them — and the PCR whistleblower story shows how the testing system itself can inflate claims. Read it →