Food is fuel for your body. It has a direct impact on how you feel as well as on your overall health. Fast food isn’t necessarily bad, but in many cases it’s highly processed and contains large amounts of carbohydrates, added sugar, unhealthy fats, and salt (sodium).
These foods are often high in calories yet offer little or no nutritional value. When fast food frequently replaces nutritious foods in your diet, it can lead to poor nutrition, poor health, and weight gain. Tests in lab animals have even shown a negative effect in short duration diets. Being overweight is a risk factor for a variety of chronic health problems including heart disease, diabetes, and stroke.
- See more at: http://www.healthline.com/health/fast-food-effects-on-body#sthash.gY9Wz9Wz.dpuf