Used in research settings to measure diamine oxidase (DAO) enzyme levels in biological samples, this ELISA kit helps investigate conditions related to impaired histamine metabolism. It is particularly valuable in studies of gastrointestinal disorders, food intolerances, and allergic responses where DAO activity may be reduced. Researchers also use it in assessing placental health during pregnancy, as DAO levels can reflect trophoblast function. The assay enables quantitative analysis, supporting both clinical research and drug development efforts focused on histamine regulation.