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In a head-to-head trial against a full-strength GLP-1 drug, tirzepatide reduced food craving without changing measured restraint. Slower stomach emptying also makes smaller portions feel filling for longer. People whose eating was driven by stress, reward, or constant mental effort often describe the quiet as relief

This test takes several hours to complete during which any fluid of any type going in or out of the body has to be carefully recorded

This matters beyond the legal question because it creates a real quality problem

For patients with good gut function and no absorption issues, it is adequate