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Recording Postprandial Glucose Reactions with Potato Starch Structural Improvements
Sadaf Bashir1, Zubair Farooq1, Sobia Zafar2
1Department of Food Science and Human Nutrition, University of Veterinary and Animal Sciences, Lahore, Pakistan.
International Journal of Food Science
|December 21, 2023
Summary
Heat-moisture treatment (HMT) modified potato starch structure, influencing its digestibility and glycemic response. Optimal conditions for resistant starch and controlled blood sugar were identified.
Area of Science:
- Food Science
- Biochemistry
- Nutrition
Background:
- Potato starch structure influences glycemic response.
- Heat-moisture treatment (HMT) is a method to modify starch properties.
- Controlling postprandial glycemic response is crucial for metabolic health.
Purpose of the Study:
- To modify potato starch structure using HMT.
- To evaluate the impact of HMT on starch digestibility (easily, slowly, resistant).
- To assess the postprandial glycemic response in humans after consuming HMT potato starch.
Main Methods:
- Potato starch was treated with varying moisture levels and temperatures.
- In vitro enzymatic digestion with pancreatin was performed.
- Human subjects consumed HMT potato starch pudding, and blood glucose levels were monitored.
- Incremental and total incremental areas under the curve (IAUC, TIAUC) were calculated.
Main Results:
- HMT increased rapidly digestible starch (20-40%) at 30°C and 70°C.
- Maximum slowly digestible starch (43.63%) occurred at 30°C with 30% moisture.
- Highest resistant starch (68.46%) was achieved at 30°C with 20% moisture.
- Highest glycemic index, load, IAUC, and TIAUC were observed with HMT at 70°C and 40% moisture.
Conclusions:
- HMT significantly alters potato starch digestibility and glycemic response.
- Specific HMT conditions (e.g., 30°C, 20% moisture) maximize resistant starch formation.
- Higher temperatures and moisture (70°C, 40%) result in a more rapid glycemic response.
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