Used for the quantitative measurement of Glucagon-like Peptide-1 (GLP-1) activity in rat serum, plasma, or cell culture samples. Commonly applied in diabetes and metabolic disease research to assess insulin secretion regulation and beta-cell function. Enables high-throughput screening of drug candidates targeting the GLP-1 receptor pathway. Provides reliable and sensitive detection for studying the effects of therapeutic interventions on incretin hormone activity in preclinical animal models.