What are disaccharides primarily made of?

Disaccharides are carbohydrates formed when two monosaccharide sugar molecules undergo a condensation reaction. This process results in the formation of a glycosidic bond between the two sugar units, leading to a compound that can be broken down into its constituent monosaccharides during digestion. Examples of common disaccharides include sucrose (composed of glucose and fructose), lactose (composed of glucose and galactose), and maltose (composed of two glucose molecules). Understanding that a disaccharide consists specifically of two monosaccharide units helps clarify the significance of their structure in nutrition and metabolism.