Used in research settings to measure diamine oxidase (DAO) levels in chicken biological samples such as serum, plasma, or tissue homogenates. This kit helps assess DAO activity, which is linked to histamine metabolism and gut health in poultry. It is commonly applied in veterinary research, animal nutrition studies, and disease monitoring to understand intestinal integrity and immune responses. The assay supports the evaluation of dietary interventions, feed additives, and gastrointestinal disorders in chicken models.