In healthy individuals, chewing 30‐times per bite increased the endogenous GLP‐1 compared with usual eating, without affecting the concentrations of blood glucose or serum insulin.59 Findings from the Watari Study in Japan showed that eating quickly was significantly associated with metabolic syndrome compared with slow eating.60 Further, eating the same meal slowly for 30 minutes instead of 5 minutes resulted in higher concentrations of GLP‐1 and peptide YY (PYY) levels in healthy subjects.61 Therefore, eating slowly and chewing more could contribute to induce GLP‐1 secretion. Here, GCG is linked to metabolic syndrome.