We need carbohydrates to make glucose, which is blood sugar. This is the main source of energy that cells use to function. There are simple carbohydrates like sugar and candy, and there are complex carbohydrates like vegetables and whole grains. When foods are processed they have less of the complex or healthy carbs, and more simple sugars in them.
The easier it is for the body to get at the sugars the faster it enters the blood stream and the faster insulin spikes in the body to deal with the sugar called glucose. Then the glucose level in your blood drops very quickly, which makes you feel hungry again in the form of cravings. This starts the cycle of eating too often and too much. More glucose than is needed for the cells to function and use up means that it gets stored and becomes fat.
Carbohydrates are our main source of energy. Most health bodies recommend that they should make up almost 50% of our diet. Athletes the day before a race traditionally eat a high- carbohydrate meal
The main sources of carbs are grains: These include wheat (bread and pasta), rice and cereal. Potatoes are another major source. Complex carbohydrates are the main types; these consist of glycogen (from glucose: Very high in energy), starch and fiber. Unrefined carbs (from brown bread, rice, pasta etc) are especially healthy because they contain more fiber, which allows us to break down waste more efficiently
It is quite noticeable, if you have a high-fibre cereal and wholemean toast for breakfast one day, and ordinary low-fibre cereal and white toast the next, you will feel much hungrier by lunchtime on the second day!