Inulin is a naturally occurring dietary fiber belonging to the group of carbohydrates known as fructans. It is widely used in food processing as a prebiotic, fiber supplement, and fat substitute due to its unique functional properties. As a fiber supplement, it enhances gut health by serving as a substrate for beneficial gut bacteria, which supports the immune system, improves metabolic health, and may contribute to the management of diabetes and cardiovascular diseases. Additionally, inulin has also demonstrated tremendous potential in influencing cognitive health through modulation of the gut-brain axis and its significant role in mineral absorption and bone health. This comprehensive analysis positions inulin as a promising dietary fiber with multifaceted therapeutic potential, from digestive health to chronic disease management.