National Headlines

CONSUMER REPORTS: Nearly half of sunscreens don’t meet the SPF claim on the label

Last updated: March 2017 

RELATED STORY
Consumer Reports … on Health: “When a nurse is as good as a doctor.”

Our tests of over 60 sunscreen lotions, sprays, sticks, and lip balms showed that you can’t always rely on the sun protection factor (SPF) number, a measure of protection from ultraviolet B (UVB) radiation, which is the chief cause of sunburn and contributes to skin cancer. We also tested for protection against ultraviolet A (UVA) rays, which tan and age skin, and also contribute to skin cancer. We found more than a dozen sunscreens that did well enough against both UVA and UVB to recommend.  

 

RELATED STORY
CONSUMER REPORTS: ‘7 steps to better doctor-patient communication’

Sunscreen Buying Guide | By CONSUMER REPORTS

The sun protection factor (SPF) is a relative measure of how long a sunscreen will protect you from UVB rays. Usually, the number is explained as the amount of time it takes an individual’s skin to burn when it’s covered in sunscreen compared to when it’s not. For example, assuming you apply and reapply the sunscreen correctly, if you’d normally burn after 20 minutes in the sun, an SPF 30 protects for about 10 hours. But intesity and wavelength distribution UVB rays vary throughout the day and by location.

RELATED STORY
Consumer Reports on ‘Concierge’ Medicine

And that calculation does not apply to UVA rays. That’s why you need a broad-spectrum sunscreen that provides protection against both types of UV rays. However, no sunscreen blocks 100 percent of UVA or UVB rays. The breakdown: SPF 30 blocks 97 percent of UVB rays, SPF 50 blocks 98 percent, and SPF 100 blocks 99 percent.

READ MORE …

SOURCE: http://www.consumerreports.org/cro/sunscreens/buying-guide.htm

Advertisements

Categories: National Headlines

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s