I looked up sunscreen recommendations on Consumer Reports and virtually every sunscreen didn’t perform as well as advertised in CR’s lab tests. CR’s top rated sunscreens all happen to be marketed for kids/babies oddly enough.
Comment on Why can't I apply SPF50 sunscreen twice to get SPF100 protection?
slazer2au@lemmy.world 2 months ago
SPF rating is subjective at best and not a regulated term in many countries.
Australia is a place where it is a regulated term and a test by Choice showed that 16 of 20 products failed their rating and several have since been recalled.
www.choice.com.au/…/sunscreen-test
Back to your original question which is answered in the article
In percentage figures that means the difference between, say, an SPF 50 sunscreen and an SPF 30 sunscreen is less impactful than you might assume. An SPF of 50 protects you from all but 1/50th of UV rays (98%), while sunscreen with an SPF of 30 protects you from all but 1/30th of UV rays (96.7%).
sheridan@lemmy.world 2 months ago
blarghly@lemmy.world 2 months ago
You get sunburned: “oh, silly me, I must have forgot to reapply”
Your baby gets sunburned and spends the next 72 hours crying: “I will murder the CEO of Johnson & Johnson”
lolrightythen@lemmy.world 2 months ago
Good writeup, yo
lemonhead2@lemmy.world 2 months ago
so if u do two spf 50 layers u should get spf 2500.
but in practice the second layer won’t be as thick…
Korhaka@sopuli.xyz 2 months ago
Depends how you apply it. I smear it on like butter.
communism@lemmy.ml 2 months ago
…How do you smear butter on your skin then?
Korhaka@sopuli.xyz 2 months ago
Like suncream
Alcoholicorn@mander.xyz 2 months ago
Careful of sunscreen stains. I apply 2 thin layers under air conditioning to minimize the moisture and allow it to fully dry.
Dojan@pawb.social 2 months ago
This is the way to do it. You need a lot of it to get the full protection that it offers.
Maroon@lemmy.world 2 months ago
No way! So like I’d be be paying exponentially more for an additional 0.6% if I brought the SPF75!
Damn.
roguetrick@lemmy.world 2 months ago
Yeah but any power gamer loves this math because that 0.6% is still a nearly 30 percent damage reduction compared to the lower grade sun armor so you’ll be stomping those pubs that don’t persue it.
protist@retrofed.com 2 months ago
Does higher SPF cost more where you live? I just bought both 50 and 100 and they were the same price
JesusTheCarpenter@feddit.uk 2 months ago
Australia? Cause it seems that there SPF is just a marketing tactic.
protist@retrofed.com 2 months ago
Texas
slazer2au@lemmy.world 2 months ago
Yep. Welcome to capitalism, where the bigger made up number actually mean very little in real terms.
AmidFuror@fedia.io 2 months ago
Everyone knows that Societ sunscreen was the pinnacle of effectiveness and issued according to need.