Sunscreen Ranker Independent ranker

Topic

UV Science Basics articles.

Every UV Science Basics article on the blog — sourced, science-led, zero hype.

UV science 19 Apr 2025 95% of the UV Hitting You Is UVA — The Aging Ray You Forget UVB gets the sunburn headlines, but the UV that reaches you all day is overwhelmingly UVA — the wavelength that quietly drives photoaging. Read article →
UV science 03 Apr 2025 2025 Trial: Polypodium + Red Orange Cut UVB Redness 46% A 2025 clinical trial gives the 'sunscreen pill' real numbers — but dermatologists are clear it supplements, never replaces, topical SPF. Read article →
UV science 30 Mar 2025 How to Check the UV Index Where You Live (Free EPA Tools) The EPA's free SunWise app gives location-based daily and hourly UV forecasts — plus ZIP-code lookups, a 4-day map, and email UV Alerts to plan your day. Read article →
UV science 20 Mar 2025 How to Read the UV Index: What Each Number Means and When to Cover Up Turn that abstract weather-app number into a daily decision: at a UV Index of 3 you need protection, and at 11+ skin can burn in minutes. Read article →
UV science 28 Feb 2025 What 'Broad Spectrum' Really Means (the 370 nm Test) 'Broad spectrum' isn't a marketing word — in the US it's a measurable FDA pass/fail line at 370 nanometers. Read article →
UV science 17 Feb 2025 Is Higher SPF Always Better? SPF 30 vs 50 vs 100 Reaching for the SPF 100 bottle feels safest, but dermatologists explain why the number alone can mislead you. Read article →
UV science 04 Feb 2025 What SPF Actually Measures — and the Math Behind 15 vs 30 vs 50 SPF 100 isn't twice as protective as SPF 50 — here's the real math behind the number on the bottle. Read article →
UV science 20 Jan 2025 UVA vs. UVB: What Each Ray Does to Your Skin and Why It Matters Once you know what UVA and UVB each do, you will understand why broad spectrum is the one word that actually matters in the sunscreen aisle. Read article →
UV science 01 Jan 2025 Photoprotection for Eczema-Prone Skin: A 2025 Practical Guide If you have atopic dermatitis, "just wear sunscreen" isn't enough — here's the layered, UV-index-driven routine clinicians now recommend. Read article →