INS and type 2 diabetes mellitus: On the contrary, Upadhyaya et al. (1988) showed that five T2DM non‐insulin‐dependent patients and seven normal subjects subjected to OGTT with or without 5 g guar gum, presented a significant reduction in glucose absorption that was higher in diabetics (−20%, p < .05) than in healthy (−13.80%, p < .05) (Upadhyaya et al., 1988).