Used in biomedical research to measure levels of prostaglandin D2 in biological samples such as plasma, serum, or tissue homogenates. It is particularly useful in studies related to inflammation, allergic responses, and immune system regulation. Researchers apply this kit to investigate conditions like asthma, allergic rhinitis, and sleep regulation, where PGD2 plays a key signaling role. The assay enables quantitative analysis with high sensitivity and specificity, supporting both in vivo and in vitro experimental models.