Sunscreen Ranker journal
The sunscreen
journal.
Daily, evidence-led notes on SPF, UV filters, and sun protection — every claim sourced, no cap.
- Application Sunscreen for Babies Under 6 Months: Why Shade Comes First For the youngest infants, the safest sun protection isn't sunscreen at all, and pediatric authorities are clear about why. Read it →
- UV science 'Water Resistant' Isn't 'Waterproof': Reading the 40- and 80-Minute Labels There's no such thing as waterproof sunscreen, and the number on the bottle tells you exactly when your protection runs out in the water. Read it →
- Seasonal UPF vs. SPF: Decoding the Number on Your Sun Shirt SPF rates your lotion; UPF rates your shirt, and understanding the difference tells you why a good garment can outwork sunscreen all day. Read it →
- Trends Does UPF Clothing Beat Sunscreen? The Data Behind the Viral Trend Sun-protective apparel is everywhere on your feed, and for once the hype holds up: the lab numbers favor fabric. Read it →
- Application 'Sunscreen Absorbs Into Your Blood': What That Headline Really Means Yes, some chemical filters enter the bloodstream, but absorption is not the same as harm, and quitting sunscreen carries its own real risk. Read it →
- UV science Why the Two-Hour Reapply Rule Is the Step You Keep Skipping Your morning application has an expiration time, and a higher SPF doesn't buy you a longer day in the sun. Read it →
- Seasonal Your Beach Umbrella Is Only SPF 3-7: The Truth About Shade That umbrella feels protective, but scattered and reflected UV sneaks in from the sides, giving you far less defense than you think. Read it →
- Skin cancer Lancet Countdown 2025: Heat Deaths Up 23%, Now 546,000 a Year A landmark health-and-climate report reframes sun and heat as a public-health emergency, not a summer inconvenience. Read it →
- Trends Spray Sunscreen Done Right: Why the FDA Says Never Aim It at Your Face Spray sunscreen is convenient, but the way most people use it leaves skin badly under-protected, and the FDA has safety concerns worth knowing. Read it →
- Application Where Sunscreen Goes in Your Routine: Last Skincare Step, Before Makeup Serum, moisturizer, or sunscreen first? Dermatologists settle the order: sunscreen is the last skincare step in the morning, right before makeup. Read it →
- UV science How Much Sunscreen Are You Actually Supposed to Use? The Teaspoon & Shot-Glass Rule Your 'SPF 50' may be performing like SPF 20-25 for one simple reason: most people apply only a fraction of the amount the label was tested with. Read it →
- Seasonal Where to Check the UV Index: Free Government Forecasts and the EPA SunWise App Turn vague sun awareness into a daily habit with authoritative, ad-free UV forecasts you can pull up by ZIP code or right from the EPA's SunWise app. Read it →
- Trends Do You Really Have to Reapply Sunscreen Every 2 Hours? The Rule, Explained The every-two-hours rule isn't arbitrary—filters degrade and rub off—but context like swimming and sweat changes when you actually need to top up. Read it →
- Application Why Dermatologists Say Skip DIY Sunscreen: The SPF 1-6 Problem The viral 'natural homemade sunscreen' trend collapses under testing—most recipes land between SPF 1.5 and SPF 6, and some have no UV protection at all. Read it →
- UV science When Is UV the Strongest? The 10 a.m.-4 p.m. Rule Explained There's a simple, memorable window for the most intense sun of the day—and understanding solar noon explains exactly why it exists. Read it →
- Trends RFK Jr. vs. Sunscreen: How the MAHA Movement Made SPF a 2025 Flashpoint When a federal health official questions sunscreen, the noise gets personal—here's how to separate 2025's culture-war framing from the cancer-prevention evidence. Read it →
- Seasonal How Long Until You Burn? Reading Burn Time From the UV Index and Your Skin Type Instead of guessing when you'll burn, learn the simple inverse rule that links the UV Index and your Fitzpatrick skin type to your personal safe-sun window. Read it →
- Trends SPF 30 vs 50 vs 100: Does a Higher Number Really Protect You More? The real percentages behind SPF 30, 50 and 100 are closer than the marketing suggests—and a big number can quietly encourage riskier behavior. Read it →
- Application The Spots Everyone Misses: Ears, Eyelids, Lips, Scalp and Feet The places you forget to protect are often the ones at highest cancer risk—here's a body-map checklist for the ears, eyelids, lips, scalp and feet. Read it →
- UV science Why UV Is Stronger at the Beach, on Snow, and at Altitude Ski trips and beach days hit you with UV from below as well as above—here's the physics of reflection and thin air that makes them so deceptively intense. Read it →
- Application After the Tests Came the Lawsuits: 2025's Wave of US SPF False-Advertising Class Actions The 2025 SPF testing scandals have moved into US courtrooms—here's what the false-advertising class actions allege and what shoppers should take from them. Read it →
- Global The UK Lab Behind the Sunscreen Scandal: TGA's 2025 Warning on Princeton Consumer Research Behind every '50+' on a bottle is a testing lab you've never heard of—and in October 2025 Australia's regulator cast serious doubt on one of them. Read it →
- Sensitive skin Best Sunscreen Texture for Oily & Acne-Prone Skin: Gels, Fluids and Sticks Compared Stop abandoning greasy lotions—matching the right sunscreen format to oily, acne-prone skin is the difference between a product you wear and one you skip. Read it →
- UV science Climate Change Is Now a Skin Cancer Driver: Longer UV Seasons, Slow Ozone Recovery A 2025 review shows warming isn't just longer beach days—it lengthens UV seasons and pushes melanoma rates higher in places that were never sun-prepared. Read it →