When it comes to skin care, perhaps you feel like you know a lot. But when Dr. Mallika Marshall is on hand on The Saturday Early Show, you may find that you don't know as much as you thought.
She is putting co-anchors Gretchen Carlson and Russ Mitchell to the test with such puzzlers as:
Does eating chocolate cause blemishes?
Does drinking water keep your skin moist?
And can toothpaste possibly help get rid of a blemish?