Dr. Michelle Hanjani,

The FDA passed new federal regulations on sunscreen labels, to take effect next year. On today's Please Explain Dr. Michelle Hanjani, Assistant Professor of Clinical Dermatology at Columbia University Medical Center tells us what those changes are, what they mean, how sunscreen works, and how much it really protects us from the sun's harmful rays.

On this week's Please Explain, we're looking into skin care and skin care products. There are numerous lotions and potions that promise to restore youthful skin, but us there any truth to the claims they make? Dr. Michelle Hanjani, assistant professor of clinical dermatology at Columbia University Medical Center joins ...