Originally Posted by
steaktaco
For the record, sunblock doesn't stop you from tanning, it keeps you from damaging your skin.
I've heard more than once that any SPF rating over 15 is redundant... I guess the way it works, maximum blocking is achieved at 15. However, I'd love if someone has a technical explanation to back this up.
I spit on this.
I have empirical information. Anything below 50, my skin erupts.