Low- or No-carb
It was created in 1972, but the Atkins diet didn't captivate America until the late '90s and early 2000s. Devotees claimed weight loss of 15 pounds in the first two weeks. And suddenly everything on grocery store shelves was "low-carb," "no-carb" and "Atkins-approved."
The Atkins diet shuns carbohydrates for proteins and fats. During the first phase of the diet, carbs are cut out almost entirely. This means no bread, grains, baked goods, pastas, fruits, nuts or alcohol. Later, "good" carbs like vegetables are slowly added back in.
The medical community states the Atkins diet is no more effective than any other diet. The consensus is that weight loss occurs not because of carb cutting, but because food intake is restricted. Nevertheless, you'll still find plenty of people eating burgers sans buns.