Fri July 6, 2012
What's Your IQ On SPF?
Originally published on Fri July 6, 2012 12:48 pm
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.