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Study of In Vivo Glucose Metabolism in High-fat Diet-fed Mice Using Oral Glucose Tolerance Test OGTT and Insulin Tolerance Test ITT
Published on: January 7, 2018
Chilled Potatoes Decrease Postprandial Glucose, Insulin, and Glucose-dependent Insulinotropic Peptide Compared to
Mindy A Patterson1, Joy Nolte Fong2, Madhura Maiya2,3
1Department of Nutrition and Food Services, Texas Woman's University, 6700 Fannin Street, Houston, TX 77030, USA. mpatterson14@twu.edu.
Consuming chilled potatoes, which are rich in resistant starch (RS), significantly improved glucose and insulin levels in women with elevated fasting glucose. This highlights a simple dietary strategy for metabolic health.
Area of Science:
- Nutrition Science
- Metabolic Health
- Food Science
Background:
- Resistant starch (RS) intake is linked to improved metabolic health markers.
- Potato cooking and serving temperature influence RS content.
- Metabolic syndrome is associated with impaired glucose and insulin regulation.
Purpose of the Study:
- To investigate the impact of resistant starch (RS) from chilled potatoes on glycemic and incretin responses.
- To compare the effects of boiled (low RS) versus baked then chilled (high RS) potatoes in females with elevated fasting glucose.
- To assess subjective satiety and subsequent dietary intake after consuming different potato preparations.
Main Methods:
- Randomized, crossover study involving 30 females with elevated fasting glucose and insulin.
- Consumption of 250g boiled (low RS) and baked then chilled (high RS) russet potatoes.
- Measurement of glycemic (glucose, insulin), incretin (GIP, GLP-1, PYY), satiety, and dietary intake responses.
Main Results:
- Chilled potatoes significantly reduced glucose and insulin levels at 15 and 30 minutes post-consumption.
- Area under the curve for insulin and glucose-dependent insulinotropic peptide (GIP) were significantly lower after consuming chilled potatoes.
- No significant differences were observed in glucose, glucagon-like peptide-1 (GLP-1), peptide YY (PYY), or subjective satiety.
Conclusions:
- Consuming chilled potatoes, higher in resistant starch, positively impacts glycemic response in females with elevated fasting glucose and insulin.
- This dietary approach may offer a practical strategy for managing postprandial glycemia.
- Further research could explore long-term effects and optimal intake levels of RS from chilled potatoes.
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