Cluster beans, better known as guar beans, are the seeds of Cyamopsis tetragonolobus, a drought-hardy legume of South Asia. The immature pods are eaten as a vegetable, but the seeds’ real fame lies in their galactomannans — the gums extracted to make guar gum, a powerful thickener and stabilizer used across foods from ice cream to salad dressings. That dual identity, vegetable and industrial hydrocolloid source, makes the crop unusually versatile. Breeders select for gum yield and viscosity, while food makers value guar gum’s cold-water solubility and synergy with other thickeners.