The search "SPF 50 vs 70" is trending — shelves are filling with SPF 70 and even SPF 100 sunscreens. Is there any real benefit?
The Math of Protection
SPF 50 blocks ~98% of UVB, SPF 70 ~98.6%, SPF 100 ~99%. The difference between 50 and 70 is just 0.6%. In practice this barely matters: both protect nearly identically when applied properly.
Why SPF 70 Is Mostly Marketing
- Real protection depends on amount applied and reapplication frequency, not +20 points;
- high SPF creates false security — "I applied it, I can stay in the sun for hours";
- the EU officially considers labels above SPF 50+ misleading, so maximum there is "50+".
What to Look For Instead of the Number
- UVA protection: the circled UVA logo or PA++++ label — UVA causes photoaging;
- Water resistance — essential for beach and pool;
- Photostable filters — new-generation (Tinosorb, Uvinul) don't break down in sunlight.
Bottom Line
SPF 70 makes sense only as a "safety margin" for very thin application. But you're better off buying SPF 50 with good UVA protection and applying it generously. And before going out, check the UV index now: below 3, the premium is unnecessary.