Sunscreen Ranker journal
The sunscreen
journal.
Daily, evidence-led notes on SPF, UV filters, and sun protection — every claim sourced, no cap.
- Skin cancer Huge VA Study: Vitamin B3 Cut Repeat Skin Cancers by Up to 54% A cheap over-the-counter B3 supplement showing this much benefit reframes skin cancer prevention beyond sunscreen alone — especially for people who've already had one. Read it →
- Filter chemistry A September 2025 Meta-Analysis Reopens the Sunscreen-and-Melanoma Debate Headlines claiming sunscreen 'doesn't prevent melanoma' need context — here's why observational studies are messy and why dermatologists still strongly recommend SPF. Read it →
- Seasonal Japan's Hottest Summer on Record: What It Means for Daily UV Protection Record heat means more hours of intense sun and more reasons to reapply — the climate backdrop behind Japan's obsession with high-PA daily sunscreen. Read it →
- Filter chemistry Sunscreen Reform Made the MAHA Report: How 2025 Politics Pushed the FDA How did a long-stalled US sunscreen filter suddenly get momentum in 2025? The answer runs through Washington politics as much as chemistry. Read it →
- Filter chemistry Why Europe Reopened the Titanium Dioxide File in September 2025 Titanium dioxide is the backbone of mineral sunscreen — here's why the EU is taking another hard look at it in 2025 and what it could (and couldn't) mean for your SPF. Read it →
- Global Could Australia Scrap SPF Numbers? Inside the TGA's 2025 Label Overhaul Australia's sunscreen scandal triggered a regulatory rethink that could change what every SPF label looks like — here's whether dropping the numbers helps or hurts you. Read it →
- Trends Should You Skip Sunscreen for Vitamin D? What the Research Shows The 'sunscreen blocks vitamin D' argument sounds convincing online — but an international expert panel found the evidence doesn't back skipping SPF. Read it →
- Application A 'Base Tan' Is Worth About SPF 3 — Why Pre-Tanning Backfires That pre-vacation tanning session feels protective, but a base tan is worth roughly SPF 3 — and getting it can raise your melanoma risk sharply. Read it →
- Global Which? 2025: A £28 Sunscreen and a £3.75 Spray Both Failed Price is no guarantee — in Which?'s 2025 test a premium £28 sunscreen failed UVA while a £3.75 spray failed SPF, both earning a 'Don't Buy.' Read it →
- UV science Sun-D Trial 2025: Daily High-SPF Lowered Vitamin D — Supplement, Don't Skip A 2025 randomized trial found daily high-SPF sunscreen nudged vitamin D down — but the answer is a supplement, not skipping your sunscreen. Read it →
- Skin cancer The Shot-Glass Rule: How Much Sunscreen You Really Need The most common reason sunscreen fails isn't the formula — it's that most people use a quarter of what they should. Here's the fix. Read it →
- UV science Yes, Darker Skin Needs Sunscreen Too — Here's the Science Melanin helps, but it's not a force field — and the survival gap in skin cancer for people of color shows why everyone needs sun protection. Read it →
- Sensitive skin Tinted Sunscreen and Iron Oxides: The Visible-Light Defense for Melasma If you have melasma or stubborn dark spots, your untinted SPF may be leaving a gap — and iron oxides are the ingredient that closes it. Read it →
- Seasonal Does the Sun Burn the Same Year-Round? A Season-by-Season UV Guide Sun protection isn't a summer-only chore — here's how UVA and UVB behave across the calendar and why winter skin still needs SPF. Read it →
- Trends Sunscreen Pills Promised to Replace SPF. The FDA Says They Can't. A pill that protects you from the sun sounds great — but the FDA warned the companies selling it, and the science is firmly on topical SPF's side. Read it →
- Application 'Water Resistant' Isn't 'Waterproof': What the 40 and 80 Minute Labels Mean Beachgoers and athletes read 'water resistant' as 'reapply-free all day' — here's what the 40- and 80-minute labels actually promise. Read it →
- Global Japan's Hottest Summer Ever in 2025 — and a New 41.8°C National Record Japan just shattered its heat records, and more days of extreme UV is exactly why high-PA+++ Japanese sunscreens and diligent reapplication matter. Read it →
- Filter chemistry TPO Banned From September 2025: The UV Gel-Nail Chemical the EU Swept Out Not every 'UV' product is sunscreen — the EU's September 2025 TPO ban targeted the UV-cured gel manicures sitting right next to your SPF. Read it →
- Seasonal Why Korea's Record 2025 Summer Explains K-Beauty's SPF Obsession Korea's summers keep getting hotter and longer — and that's the backstory to why Korean sunscreen culture is built around easy, all-day reapplication. Read it →
- Global South Korea's Hottest Summer Since 1973: 28 Heatwave Days in 2025 A record-breaking Korean summer means more high-UV days — and a stronger case for the lightweight, reapply-friendly SPF that K-beauty built its reputation on. Read it →
- Skin cancer Why Men Die From Melanoma More Often — and How to Flip the Odds Melanoma is one of the few cancers that kills men more often than women — here's why, and the simple habits that change that. Read it →
- UV science The Fitzpatrick Skin Type Scale: Finding Your Type and Sun Sensitivity Find your Fitzpatrick skin type and you can calibrate sun-protection habits to how your skin actually responds to UV. Read it →
- Sensitive skin Sunscreen With Eczema: Why Fragrance-Free Mineral Formulas Reduce Flares Eczema-prone skin needs sun protection too; here is how to choose an SPF that shields you from UV without triggering a flare. Read it →
- Formulation A 2025 Study Scores White Cast: How Much Zinc Before Mineral SPF Looks Ashy A 2025 PLoS One study built the first standardized white-cast scale, giving you a concrete zinc-oxide percentage rule for picking a mineral SPF that won't leave you ashy. Read it →