What’s Your IQ on SPF?

In an unscientific survey of Times Square, Science Friday found that not one passerby could explain how sunscreen works. Dermatologist Jennifer Linder explains that and other basics of sun protection, including the meaning of SPF, and whether sunscreen blocks vitamin D production.

In the SciFri Snack: Dermatologist Jennifer Linder gives us a quick tip about using clothes as sunscreen. Hear more — and join the conversation — on Soundcloud.

Segment Guests

Jennifer Linder

Jennifer Linder is a Dermatologist and Assistant Clinical Professor at the Department of Dermatology with the University of California in San Francisco. She is based in Scottsdale, Arizona.