Health

by TIME Photo

by TIME Staff

by Alexandra Sifferlin

by Mandy Oaklander

by Belinda Luscombe

by Mandy Oaklander

by Kevin McSpadden

by Dr. Dean Ornish

by Justin Worland

by Alexandra Sifferlin

by Nancy Gibbs

by Justin Worland

by Laura Carstensen

by Alice Park

by Jeffrey Kluger