This study characterised the most cultivated and consumed roots and tubers (cocoyam, sweet potato and cassava-TMS
0581, except water yam) in Nigeria, based on their chemical composition, in vitro starch digestibility and the estimated
glycemic index. Samples were analysed for proximate composition, resistant starch, amylose content, in vitro starch
digestibility and the estimated glycemic index using standard analytical methods. The result showed that the moisture
content of the samples ranged from 11.67 to 12.63% dry matter; ash content (3.20-3.98%); fat content (1.14-2.65%); crude
fibre (1.03-2.34%); protein content (1.56-4.75%); carbohydrate content (86.28-92.99%); energy value (387.97-390.66
Kcal/ 100 g); amylose (21.30-32.67%) and resistant starch (4.73-15.23 g/ 100 g). The in vitro starch digestibility ranged
from 1.34 mg/ g to 3.19 mg/ g and the estimated glycemic index from 53.57 to 63.79%. Water yam with the least values of
in vitro starch digestibility and the estimated glycemic index can be used as a suitable and reliable low glycemic index food
for diabetic patients because of its potential to undergo a slower but gradual release of glucose into the blood stream.
PAPER TITLE :CHEMICAL PROPERTIES, IN VITRO STARCH DIGESTIBILITY AND THE ESTIMATED GLYCEMIC INDEX OF WATER YAM, CO
APPLIED TROPICAL AGRICULTURE | VOLUME 21 NUMBER 3 2016
Paper Details
- Author(s) : Afolabi, O.A.*, Osamudiamen, P.M. and Osundahunsi, O.F.
- Abstract:
