Free sugar content, in vitro starch digestibility and predicted glycemic index of ready-to-eat breakfast cereals commonly consumed in Turkey: An evaluation of nutritional quality
2019
Yaman, Mustafa | Sargın, Hafsa Sena | Mızrak, Ömer Faruk
Breakfast cereal products are produced using the extrusion technique, which improves their digestion and absorption in the small intestine. However, this technique may cause an increase in the glycemic index of a food. Although high carbohydrate-rich foods are consumed in Turkey, there is not enough information about their GIs. The purpose of this study was to determine the free sugar content, in vitro starch digestibility, and predicted GI of different types of breakfast cereals commonly consumed in Turkey and evaluate their nutritional quality. The hydrolysis index of breakfast cereals ranged from 78.1 to 114.9, whereas the GI ranged from 82.6 to 102.8. The GI of 6 out of 12 breakfast cereal products was higher than that of white bread. Free sugar content, rapidly available glucose, and resistant starch amounts were significantly related to the increase and decrease of GIs in breakfast cereals, but there was no significant relationship between rapidly and slowly digestible starches. This may be related to the free sugar content in the samples and the extent of extrusion used for the samples. When the breakfast cereal groups were evaluated, overall, the GIs of samples containing oats were lower than those containing rice and corn.
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