2.7. Glucagon-like Peptide 1
In the RPG meal preparation series, blood samples were collected from the antecubital vein and centrifuged to separate the serum, which was frozen and stored at −20 °C. GLP-1 was detected using an enzyme-linked immunosorbent assay (Shanghai Jianglai Biotechnology Co., Ltd., Shanghai, China, Article No.: JL12839).