"De-satiation" produced by liquid diet in rats satiated for glucose solution

Previous work has shown that after rats have drunk a glucose solution to "satiety," and during the time when solution intake would remain inhibited, intake can be reinstated by offering powdered glucose. This "de-satiation" phenomenon shows that solution intake comes to an end before any limit on caloric or solute intake has been reached. Here we show that a milk-based liquid diet can also reinstate ingestion in the solution-sated rat. And such a rat increases its intake further when the diet is diluted with water. Therefore, the original "satiety" for glucose solution does not reflect a refusal of fluid per se, or of water; nor does it reflect an inhibition on the lapping response.