Glycaemic index and Glycaemic load (a) of dough meal supplemented with soybean cake and cassava fibre, and Percentage of blood glucose reduction (b) in Wistar rats fed with the experimental diets, control and metformin. Values are Mean ± SEM. Bars with different alphabet show that they are significantly different (p < 0.05). GI classification: Low-GI = <55 %; Medium-GI = 56–69 %; High-GI = >70. GL classification: Low-GL = <10; Medium-GL = 11–19; High-GL = >20. Where: PSC-1 = Soycake: 19.01 %; Cassava fibre: 5.0 %; Unripe plantain: 75.99 %. PSC-2 = Soycake: 15.0 %; Cassava fibre: 8.0 %; Unripe plantain: 77.0 %. PSC-3 = Soycake: 25.0 %; Cassava fibre: 8.0 %; Unripe plantain: 67.0 %. CER Cerolina (Control), PLT plantain (100 %), MET metformin (a synthetic antidiabetic drug). 1Blood glucose level in diabetic rats after being induced with aloxan. 2Blood glucose level in rat after feeding them with formulated diets, metformin or cerolina