Does a sunscreen labeled SPF 30 block twice as much UV radiation as - ProProfs Discuss
Advertisement

Does a sunscreen labeled SPF 30 block twice as much UV radiation as one labeled SPF 15?

Asked by Liam, Last updated: Oct 28, 2021

+ Answer
Request
Question menu
Vote up Vote down

1 Answer

John Smith

John Smith

John Smith
John Smith

Answered Sep 08, 2016

False

The correct answer is false. The sun protection factor (spf) describes how long a product will protect your skin, if you apply the sunscreen correctly. Fair-skinned people begin to burn in about 15 minutes on a sunny day, so wearing an spf 15 sunscreen (if applied and reapplied properly) would prevent sunburn for about 225 minutes (15 spf x 15 minutes until sun burn= 225), or 3 hours and 45 minutes. The spf 30 sunscreen should last for 450 minutes (30 x 15 = 450), or 7 hours and 30 minutes. In practical use, you'll need to reapply sunscreen every 2 hours. be sure to choose a broad spectrum product that blocks uvb and uva light and use a lot.

upvote downvote
Reply 

Advertisement
Advertisement
Search for Google images Google Image Icon
Select a recommended image
Upload from your computer Loader
Image Preview
Search for Google images Google Image Icon
Select a recommended image
Upload from your computer Loader
Image Preview
Search for Google images Google Image Icon
Select a recommended image
Upload from your computer Loader

Email Sent
We have sent an email to your address "" with instructions to reset your password.