I Can't Live Without My...
Derma Topix Intensive Hand Cream ($14.50; dermstore.com
"It's the best hand cream, bar none. I wash my hands all day long while seeing patients, and this cream leaves my skin with a silky finish that lasts through multiple washings. Luckily, it comes in a three-ounce tube that I can take on the plane—because I never leave home without it." — New York City dermatologist Heidi Waldorf, MD