Used in biomedical research to quantify sphingosine 1-phosphate (S1P) levels in human biological samples such as plasma, serum, and cell culture supernatants. This kit supports studies related to immune regulation, inflammation, cardiovascular function, and cancer progression, where S1P acts as a key signaling lipid. It is particularly valuable in evaluating S1P dynamics in clinical research and drug development targeting S1P receptors or metabolic pathways. The assay enables high-throughput, accurate measurement essential for biomarker discovery and validation.