What is the end product of carbohydrate digestion?

• A. Fructose.
• B. Galactose.
• C. Glucose.
• D. Lactose.

Answer: (C)

Carbohydrate digestion ends with monosaccharides that can be absorbed and used for energy. The three monosaccharides produced are glucose, galactose, and fructose. Glucose is the primary end product utilized by most tissues for energy, while galactose and fructose are transported to the liver and then converted to glucose before entering circulation. Therefore, glucose is the best answer because it represents the main usable energy substrate resulting from carbohydrate digestion. Lactose is a disaccharide and not an end product of digestion.