Stereoisomers are molecules that share the same molecular formula and arrangement of atoms, but differ from one another in 3-dimensional space. Geometric isomers and isomers containing an asymmetric center are the two main subcategories of stereoisomers.

Carbohydrate stereochemistry involves the study of stereoisomers, which are molecules with the same chemical formula and bonds but different absolute configurations. Stereoisomers only differ in the spatial arrangement of their atoms.

Carbohydrates, or carbs, are sugar molecules. Along with proteins and fats, carbohydrates are one of three main nutrients found in foods and drinks. Your body breaks down carbohydrates into glucose.