NCI-H716 cells (5.0×104) were seeded in a 96-well culture plate to induce cell differentiation for two days before the GLP-1 experiments. When the cells grew to 80% confluence, the culture medium was replaced with a serum-free DMEM supplemented with 0.2% BSA, and the cells were treated with SA at different concentrations for 24 h in the medium. Cell viability was measured using the cell counting kit - CCK8 assay Kit (Dojindo, Japan) (n = 6/group). The percentage of living cells was calculated, which were described in this research.16 (link)