(a) The GABA, total phenolic, and anthocyanin content of germinated and non-germinated black rice. BG: Before germination, AG: After germination. Total phenolic content was represented as mg of gallic acid equivalent (mg GAE) per g of extract. Total anthocyanin content was represented as mg cyanidin chloride equivalent (mg CCE) per g of extract. *** Significant difference (p < 0.001); (b) Effect of GBRE supplements on the body mass of the experimental rats; (c) Total weight gain (total weight gained by the rat at end of the experiment (week 12) from the initial day of the experiment) in experimental rats. C: Control, LD: Low dose of GBRE to naïve rat, HD: High dose of GBRE to naïve rat, DM: Diabetes Mellitus induced rat, Pre-DM-LD: Low dose of GBRE to naïve rat and induced DM, Pre-DM-HD: High dose of GBRE to naïve rat and induced DM; Post-DM-LD: Low dose of GBRE to DM rat, Post-DM-HD: High dose of GBRE to DM rat.