Sources of Carbohydrates
Carbohydrates are found in many foods. They are found mostly in foods of plant origin. There was very little in foods of animal origin except for milk which is a source of lactose.
Simple carbohydrates
Glucose is rarely encountered in this simple form in nature. Fructose is naturally present in fruits, corn, honey. Sucrose is composed of one molecule of glucose and one fructose molecule. This disaccharide is a carbohydrate reserve of plant species such as sugar beet or cane sugar. It is the white sugar, our table sugar. Lactose is composed of one glucose and one galactose molecule: the milk sugar. The maltose present in the malt combines two molecules of glucose.