Exudate is the fluid released from food when it is cooked — the juices that weep from meat in the pan, from mushrooms as they sauté, from a pie filling as it bakes. The heat contracts proteins and ruptures cells, squeezing out water carrying dissolved proteins, minerals, and flavour compounds: the brown juices under a roast, the liquid a salted aubergine sheds, the whey seeping from a fresh cheese. Cooks manage exudate constantly — searing meat in uncrowded pans so the juices evaporate rather than stew the surface, draining mushrooms before they braise in their own liquid, thickening pie fillings to hold theirs. In packaged meats, excessive exudate — purge in the tray — signals poor water-holding and reads as low quality. It is the food’s internal water, set free by heat.