What Americans consider "healthy eating" has changed a lot over the past 50 years. Nutrition is an ever-evolving field, and as time advances, the definition of a good diet changes too. But how different were things a few decades back, and how much have they changed in today's America?
From grapefruit diets to low-carb fads and everything in between, in this gallery, we take you back in time to the foods once praised for their health benefits. Read on to find out how America's idea of a healthy diet has evolved in the last half-century.