A dipsogen is something that provokes thirst — any substance or stimulus that triggers the sensation of thirst. Salt is the archetypal dipsogen, raising plasma osmolality until the brain’s thirst centres demand water; alcohol acts as one by blocking antidiuretic hormone and driving water loss; dry foods, spicy heat, and even the sight of salt can play the role behaviourally. Physiologists use the term when mapping the control of drinking — distinguishing dipsogens, which drive intake, from the satiety signals that stop it. In practical food terms, the dipsogen is the quiet partner of beverage sales: the salted snack formulated to make the beer go down. The word completes the thirst family alongside dipsesis, dipsetic, and -dipsia — naming the trigger where the others name the state, the quality, and the word-form.