It is because your body starts metabolizing almost right away, when it comes to carbohydrates. Now just imagine those carbohydrates are made up of simple carbohydrates sugarlike in regular soda, potato chips or other over processed snack foods, or French fries deep fried potatoes that are loaded with saturated fat and heavy on the high glycemic index scale of carbohydrates. Also there have been some recent studies that have stated that high fructose corn syrup found in many foods produced for children that include fruit drinks, fruit snacks, and things like ketchup, are helping enormously to contribute to the huge increases in childhood obesity.
Here are some other great options One of the keys to a lean, sexy, healthy body is controlling insulin production and bloodsugar levels. The easiest way to do that is by eating healthy lowglycemic foods things like vegetables, fibrous fruits, whole grains, seeds, nuts, lean proteins, etc. Generally, it's a good idea to avoid most foods that contain highglycemic ingredients like white flour, white sugar, corn syrup, etc. These are those 'bad' foods that wreak havoc on your insulin levels and increase your body fat levels in the process.