The more people eat fast food, the poorer their insulin resistance and the lower their levels of HDL (good) cholesterol, according to a study in the Journal of Nutrition. But that's not the case with those who eat at other restaurants. Study author Kiyah J. Duffey, Ph.D., hypothesizes why.
1. Side Dishes
Restaurants usually offer a wider range of healthier side dishes, like soups or salads. In a fast-food restaurant, people may just opt for the french fries.
2. Added Ingredients
Fast food may have more fat, sugar, and sodium than other restaurant food does. And diners may be more likely to order sugary drinks with their meals at a take-out joint.
3. Fast Service
Fast food is, well, fast. When you eat quickly, the satiety signals your body sends out may register too late, so you consume more calories than you would if you'd eaten at a slower pace.