Research paper
Rennard BO, Ertl RF, Gossman GL, Robbins RA, Rennard SI. Chicken soup inhibits neutrophil chemotaxis in vitro. Chest. 2000 Oct;118(4):1150-7. doi:10.1378/chest.118.4.1150
Why we cite it
Provides the first laboratory evidence that chicken soup has anti-inflammatory properties — specifically, concentration-dependent inhibition of neutrophil chemotaxis. Establishes a mechanistic basis for the folk remedy's traditional use in upper respiratory infections, showing the effect is due to water-soluble compounds from both the chicken and vegetable ingredients acting together.