In addition, Kang et al. [41] also found a similar conclusion in human studies, showing that dietary capsaicin (200–400 ppm) can reduce obesity and promote intestinal health by increasing the Fractions/Bacteroidetes ratio and Faecalibacterium abundance, and at the same time increasing the level of plasma glucagon such as GLP-1 and GIP. This evidence concerns the gene GCG and obesity disorder.