3 Types of Carbohydrates are Sugar, Starch, and Fiber
Sugar is a simple carbohydrate, gives quick energy, and burns quickly in the body.
Starch & Fiber are complex carbohydrates, give long lasting energy, are more filling and carry other nutrients.
The functions of carbohydrates: provide energy, store energy, build macro-molecules, and spare protein and fat for other uses like energy.
Our body breaks down carbohydrates into simple sugars absorbed into the bloodstream. As the sugar level rises the pancreas releases a hormone insulin. Insulin then moves sugar from the blood cells where then the sugar is used as energy.
People use food labels, so they know what kind of carbohydrates they are having and of how much they are taking in each serving. Serving sizes are helpful so you don't eat too much of one kind of carb.
Not getting enough carbohydrates in your diet can cause lack of calories, or lead to excessive intake of fats to make up for the calories not eaten as carbs.
Eating too many carbohydrates can lead to an increase in total calories, which can lead to obesity.