Skin Care Products That Work While You Sleep

We've all heard that a good night's rest helps your appearance, and it's no myth.

"Sleep boosts circulation, and blood carries the nutrients, growth hormones and oxygen you need to produce collagen, build new cells and reverse damage that ages skin and hair," explains Howard Murad, MD, an associate clinical professor of medicine at the University of California at Los Angeles. Sleep also elevates the hormone melatonin, which shields against fine lines, discoloration and even certain types of cancer.

Thing is, regularly getting enough Z's can be mission impossible. And while your own eyewitness account of dark circles and puffiness might be all the proof you need, research also c