Guar gum is a natural high-molecular-weight polysaccharide extracted from the endosperm of guar beans (Cyamopsis tetragonoloba). It consists primarily of galactomannan chains featuring a linear backbone of β-1,4-linked D-mannose units with α-1,6-linked D-galactose side chains occurring at approximately every second mannose residue. This structure imparts exceptional thickening, stabilizing, and emulsifying properties, making it widely used in food processing, pharmaceuticals, and industrial applications. It forms viscous solutions at low concentrations and exhibits pseudoplastic flow behavior. Guar gum is approved as GRAS by the FDA and functions as a dietary fiber with minimal caloric contribution due to limited human digestion.