[DennisAJC]

Does sunscreen prevent tanning? Or does it just protect from skin cancer or other stuff. I was shocked not to know this answer.

I've never used it before but after driving around this past few days, my left arm looks extremely dark as opposed to the rest of my body. I need to stop this process. It's really noticable when I stand naked in front of the mirror before I take a shower.

Any advice? Serious question.