Profiling the invitro glycemic index determination of some under utilized tubers flours

Abstract: Some underutilized tubers:Aerial yam (Dioscorea bulbifera), Cocoyam (Xanthosoma robustum) and Water yam (Dioscorea alata) were analysed for their glycemic indices using Invitro method after they have undergone four pre-processing operations of boiling, sprouting, frying, roasting and a set was left untreated. Boiled Cocoyam (Xanthosoma robustum) was significantly different (p<0.05) in terms of glycemic index (40.217)% compared to the other samples while among the processing methods, boiling was significantly different (p<0.05) from sprouting, frying and roasting. The untreated samples were the control samples.

Keywords: Underutilized tuber species, Glycemic Index, pre-processing operations, Dioscorea bulbifera Xanthosoma robustum, Dioscorea alata.