Health

by Maya Rhodan

by Justin Worland

by Laura Stampler

by Richard Conway

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 and Michael Duffy