Sun & UV
High UV in Miami in November: Why the Forecast Number Beats the Thermometer
Miami is reading a high UV index in early November. Here is what the EPA, WHO, CDC and FDA say to do about it, and how to build a simple layered routine.
6 min read
Sun & UV
Sun & UV
How to Reapply Sunscreen Over Makeup: What Regulators and Dermatologists Say
The two-hour rule is clear, but doing it over foundation is not. Here is what FDA, AAD and a dermatologist say about powders, sprays and the amount problem.
5 min read
Sun & UV
Iron Oxides in Tinted Sunscreen: 97% of 37 Products Did Not List Them as Actives, and Visible Light Claims Go Untested
A 2026 audit of 37 tinted sunscreens found iron oxides rarely disclosed and visible-light claims rarely backed by public testing. Here is what the evidence says and how to shop around the gap.
5 min read
Sun & UV
Sunscreen Sticks: Why One Swipe Falls Short of the SPF on the Label
Sticks are convenient, but a hands-on test found one layer delivered under half the amount the SPF rating assumes. Here is how to use one properly and where it fits.
5 min read
Sun & UV
Facial Sunscreen Sprays: Why FDA and AAD Say Spray Your Hands, Not Your Face
Spray sunscreen is popular for face routines, but official guidance says not to spray it directly on the face. Here is how to apply enough, avoid wind and flames, and reapply properly.
4 min read
Sun & UV
Miami's UV Is Flagged High in Late October, and the Cool Mornings Are the Trap
Temperature isn't how UV works, so cooler fall days in Miami don't lower the number. Here is how to read the index, use the shadow check, and cover the car-window gap.
5 min read
Sun & UV
Daily SPF 50 and Vitamin D: What a Year-Long Trial Found
The Sun-D randomized trial tested a year of routine SPF 50+ use against discretionary use and measured vitamin D. Here are the actual numbers and what the researchers advise.
5 min read
Sun & UV
Sunscreen Pilling Under Makeup: How to Fix the Layers Without Using Less SPF
Sunscreen that balls up or slides under foundation usually comes down to layering and timing, not dose. Here is how to keep the full amount on your face and still get smooth makeup.
5 min read
Sun & UV
Sunscreen Before Sunrise? What Low-Sun UV Data Says About Early Mornings
UV is usually in the low range around sunrise, but it climbs fast and scattered light still reaches you. Here is how to decide for an early run or commute.
5 min read
Sun & UV
Chemical Sunscreen Filters: What the FDA Absorption Trials Showed, and What They Did Not
Two JAMA trials found common chemical filters in the bloodstream above an FDA testing threshold. Here is what that threshold means, what the trials left unanswered, and how to choose a formula you will actually wear.
5 min read
Sun & UV
Bemotrizinol Sunscreen Filter: What the FDA Order Allows and How to Read the Label
A new sunscreen active was added to the US monograph in June 2026. Here is what the order permits, what it excludes, and what to check on a label.
5 min read
Sun & UV
Miami's UV Index Is Still Very High in September While Sunscreen Habits Hit Their Fall Low
Live forecasts put Miami's UV Index at a very-high 9 this week, even as a national survey shows sunscreen use already falling toward its lowest point of the year. Here is why warm-climate zip codes need a different September routine.
5 min read
Sun & UV
The 80 Percent Sun Exposure Myth Back-to-School Advice Still Repeats
New York's UV Index is still hitting the high range this week even as kids head back to school, and the science behind the old 80-percent-by-18 sun exposure claim points the bigger risk at the parents dropping them off. Here is what the only study to actually measure cumulative UV dose by age found instead.
5 min read
Sun & UV
New York's UV Index Hasn't Dropped: What Late-August Sun Still Does to Skin
New York's UV index is still reading High to Very High in the final week of August 2026, and the sun's angle in the sky barely differs from mid-April. Here is what that means for bare skin, sunscreen timing, and clothing coverage right now.
5 min read
Sun & UV
LA's Historic Heat Wave Is Pushing UV to Very High Everywhere, Including the Cool Coast
Los Angeles just logged its first three straight days of triple-digit heat since the 1880s, and the high-pressure dome driving it is also pushing UV into the very-high range across the whole metro, including the 85-degree coast.
6 min read
Sun & UV
Chicago's UV Index Just Hit 7.8: The Cloud Myth Keeping Midwest Skin Unprotected
Chicago's UV index is forecast to reach 7.8 today, a Very High reading typically associated with sunbelt cities. The reason it goes unprotected traces to a sensory mix-up between brightness and actual UV transmission.
5 min read
Sun & UV
Miami Tied an 84-Year Heat Record at UV 11: What That Means for Your Sunscreen
When Miami tied its all-time heat record under an extreme UV reading, the real complication was not sunscreen washing off in sweat, but that some formulas slow sweating down in the first place.
5 min read
Sun & UV
Phoenix's UV Index Just Hit 10 After Two Rare Category 5 Dust Storms: What Changes For Skin
A very high UV Index arrived in Phoenix the same week two Category 5 haboobs pushed local air quality to dangerous levels, and wind changes how long sunscreen actually lasts. Here's what the combination does to skin, and how the routine should shift when UV, wind, and pollution stack together.
5 min read
Sun & UV
Bemotrizinol Just Cleared the FDA: What Changes for US Sunscreen This Fall
Bemotrizinol became legal to use in US sunscreens on August 9, 2026, after a 21-year regulatory wait. Here is what the filter actually does, how it compares to avobenzone and zinc oxide, and when it will realistically reach shelves.
6 min read