By the Numbers | Dieting habits of Americans

45: Percentage of American women who are on diets

25: Percentage of American men who are on diets

16: Percentage of American women who have tried low-carb diets

7: Percentage of American men who have tried low-carb diets

91: Percentage of women on college campuses who have tried to control their weight through dieting

40 billion: Dollars Americans spend on dieting and diet-related products per year
66: Percentage of American adults who are overweight or obese

60 to 90: Minutes previously overweight adults should exercise daily to sustain weight loss