In honor of Friday, a public service announcement from your local dermatologist – wait for it..
Sunscreen. Does. Not. Last. All. Day.
I get surprised looks when I remind my patients, as I typically do during their yearly body scans, that I recommend re-applying sunscreen every two hours. Aside from the issue of moisture threats from perspiration and the pool, sunscreen, even if left on your skin without any moisture only lasts so long. After that, it’s as if you’re back at square one. Hence the gentle reminder to reapply.
If you think about it, the longest guaranteed time that manufacturers can claim their product lasts is 80 minutes, specifically for the waterproof ones. I think 80 minutes is probably a good benchmark across the board.