Very much opposite to simple carbohydrates are complex carbohydrates. These are basically found in whole grain form. Unlike simple carbohydrates, complex carbohydrates are recommended by most fitness professionals.
A key to maintaining good health is to replace the intake of simple carbohydrates by complex carbohydrates. The body breaks down all carbohydrates into glucose. It then produces something known as an energy molecule, which is medically known as Adenosine Triphosphate (ATP). Unlike simple carbohydrates, complex carbohydrates take time to be broken down into glucose and ultimately into ATP molecule. Natural complex carbohydrates also provide essential minerals and vitamins required for the body. Also these carbohydrates are digested faster than fats and so one may feel hungry soon.
Key sources of complex carbohydrates are bran, wheat gram, barley, maize, and oatmeal. These are rich sources but not the only sources of carbohydrates. Consuming carbohydrate - rich diet might also make one feel thirsty quite often. This is because carbohydrates tend to consume an extra molecule of water when digested. No harm in it but one must take adequate amount of water to balance the body conditions. The measure of how much water one should take is easy to calculate. Just divide your weight in half. The number you get is the ounces of water you should consume in one day.
Complex carbohydrates are often named "good" carbohydrates. Processed foods come under the "bad" category as they are a little tough on the body. Medically speaking, processed foods do not actually contain a lot of fiber. So the body does not know how to process these artificially developed carbohydrates. But still, the body performs the digestion process but not with ease and therefore more of it can cause trouble. So if one is inclined on staying fit for the rest of the life, then one should have adequate knowledge on the type of carbohydrate they are consuming.