Composed of three elements: carbon, hydrogen and oxygen.
Carbohydrates are also known as sugars.
Carbohydrates are divided into four categories: monosaccharides, disaccharides, oligosaccharides, and polysaccharides. The three types of sugar conjugates are glycolipids, glycoproteins, and proteoglycans.
The main food sources of carbohydrates are sucrose, grains (e.g., rice, wheat, corn, barley, oats, sorghum, etc.), fruits (e.g., sugarcane, melons, watermelon, bananas, grapes, etc.), nuts, and vegetables (e.g., carrots, sweet potatoes, etc.).