Sunscreen Ranker journal
The sunscreen
journal.
Daily, evidence-led notes on SPF, UV filters, and sun protection — every claim sourced, no cap.
- UV science Up to 80% of UV Gets Through Clouds — Yes, You Still Burn Gray skies feel like a sunscreen day off, but up to 80% of UV slips through cloud cover — so the burn and the DNA damage still happen. Read it →
- Sensitive skin Healing Acne Scars? Sun Protection Stops Them Darkening After scar treatment, sun can darken the very skin you're trying to heal — here's the dermatologist-backed protection plan for the weeks that matter most. Read it →
- Filter chemistry One Base, 21 Sunscreens: The Wild Child Formula That Failed SPF Dozens of 'different' sunscreen brands are built from the same wholesale base — and when Australia's TGA tested one shared formula, 21 products failed at once. Read it →
- Global Australia's TGA Flags 21 Sunscreens After CHOICE Test (2025) When a national regulator warns that 21 sunscreens may be far weaker than labeled, it's a lesson in why third-party SPF testing matters for the bottle in your bag. Read it →
- Sensitive skin Coppertone Recalls 5 Spray Sunscreens Over Benzene (2025) Coppertone pulled five aerosol sunscreens over benzene in September 2025 — here's how to check your lot numbers and why sensitive-skin users may want lotions instead. Read it →
- Makeup + SPF Tinted SPF Beat Clear Sunscreen for Melasma in a 2025 Trial A 2025 randomized trial shows the iron-oxide tint in your sunscreen isn't just coverage — it measurably kept melasma skin more even-toned through summer than a clear formula. Read it →
- Sensitive skin Tinted Sunscreen Beats Clear SPF for Melasma: A 2025 Randomized Summer Trial If clear SPF hasn't touched your stubborn dark patches, a 2025 trial explains why — and why iron-oxide-tinted sunscreen objectively outperformed it in real summer sun. Read it →
- Formulation 2025 Trial: Tinted Sunscreen Beat Untinted for Evening Out Melasma If you have melasma, the tint isn't just cosmetic — a 2025 trial shows iron-oxide color doing real work against the visible light that plain SPF lets through. Read it →
- Seasonal The Summer Solstice and Your Skin: Why Late June Brings the Year's Highest UV The longest day of the year is also the most intense — here's how the solstice translates to a concrete sun-protection takeaway. Read it →
- Trends Do People With Dark Skin Need Sunscreen? Debunking a Dangerous Melanin Myth Melanin helps — but nowhere near as much as the myth claims, and the consequences of believing it can be deadly. Read it →
- Application How to Actually Use Spray Sunscreen So It Works A quick spritz leaves you barely protected — here's how to use spray SPF so it actually does its job. Read it →
- Skin cancer Driver's-Side Skin Cancer: Why UVA Through Car Windows Hits Your Left Arm Your commute is sun exposure you've never accounted for — and the data shows it shows up on your left side. Read it →
- UV science UV Radiation Isn't Heat: Why You Can Burn on a Cold, Cloudy Day Your skin senses heat, not UV — which is exactly why a cold, overcast day can hand you a sunburn you never saw coming. Read it →
- Sensitive skin Acne Dark Spots: Why Sunscreen Is the Most Proven Way to Stop PIH If you're chasing serums to fade acne marks, you're skipping the single highest-evidence step — daily SPF is what stops post-inflammatory hyperpigmentation from getting worse. Read it →
- Seasonal Spring Is the Sneakiest Sunburn Season: Why March–May Catches You Off Guard Cool air fools you into skipping SPF — but by late spring the sun is already as strong as late summer, on skin that hasn't seen the sun all winter. Read it →
- 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 →