There are carbs that are good for you, and these are carbs that are low-glycemic foods that gradually increase your blood sugar levels over time. This is much less stress for the pancreas. Unlike bad carbs, they are whole foods packed with nutrients that the body needs to function. Good carbs are best when eaten in their natural, raw state.
Another great thing is that good carbs tend to have less calories than bad carbs so you can actually eat more food, which surprises many people trying to lose weight. For example you can eat a whole apple or banana as opposed to one bite of a white bread dinner roll. Which makes sense when you think that most bad carbs are defines as non-nutritive, high-glycemic foods that spike your blood sugar too rapidly. These include heavily processed foods that contain refined sugar, refined white flour, additives, chemicals, and preservatives.
Bad carbohydrates, in the end, will cause you to gain weight. When you put to many empty calories in your body you are giving your body too much energy from high-glycemic carbs and the energy has to go somewhere. Any idea where it goes? It is stored as fat! Yuck! These excess fat stores put you at increased risk for heart disease, high cholesterol, high blood pressure, stroke, and many other chronic conditions.