Also, remember that SPF is only an indication of effectiveness againstUVB rays.
You should avoid a low SPF sunscreen or suntan lotion, which don’t provide enough sun protection.
The new labels would also clearly state if a sunscreen offered ‘no UVA protection.’
Andre Lichtenberg/Getty Images
If a sunscreen is now labeled Broad Spectrum, then it does protect against UVA rays.
So What Does SPF Really Mean?
And remember that sunscreen becomes less effective after about two hours and needs to be reapplied.
Consumer Reports.What does SPF stand for?May 15, 2015.
U.S. Food and Drug Administration.Sunscreen: how to help protect your skin from the sun.
August 29, 2019.
Bielinski K, Bielinski N.UV radiation transmittance: regular clothing versus sun-protective clothing.Cutis.2014;94(3):135-8.
U.S. Food and Drug Administration.
Sun Protection Factor (SPF).
July 14, 2017.
Centers for Disease Control and Prevention.
National Institute for Occupational Safety and Health.Sun exposure.
Reviewed June 1, 2018.
