Cited by 72Food composition and propertiesPotato Plant ResearchNatural Antidiabetic Agents Studies

The impact of starchy food structure on postprandial glycemic response and appetite: a systematic review with meta-analysis of randomized crossover trials

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Cai, Mingzhu, Dou, Bowen, Pugh, Jennifer E, Lett, Aaron M, Frost, Gary S·2021·The American Journal of Clinical Nutrition

Abstract

BACKGROUND: Starchy foods can have a profound effect on metabolism. The structural properties of starchy foods can affect their digestibility and postprandial metabolic responses, which in the long term may be associated with the risk of type 2 diabetes and obesity. OBJECTIVES: This systematic review sought to evaluate the clinical evidence regarding the impact of the microstructures within starchy foods on postprandial glucose and insulin responses alongside appetite regulation. METHODS: A systematic search was performed in the PUBMED, Ovid Medicine, EMBASE, and Google Scholar databases for data published up to 18 January 2021. Data were extracted by 3 independent reviewers from randomized crossover trials (RCTs) that investigated the effect of microstructural factors on postprandial glucose, insulin, appetite-regulating hormone responses, and subjective satiety scores in healthy participants. RESULTS: We identified 745 potential articles, and 25 RCTs (n = 369 participants) met our inclusion criteria: 6 evaluated the amylose-to-amylopectin ratio, 6 evaluated the degree of starch gelatinization, 2 evaluated the degree of starch retrogradation, 1 studied starch-protein interactions, and 12 investigated cell and tissue structures. Meta-analyses showed that significant reductions in postprandial glucose and insulin levels was caused by starch with a high amylose content [standardized mean difference (SMD) = -0.64 mmol/L*min (95% CI: -0.83 to -0.46) and SMD = -0.81 pmol/L*min (95% CI: -1.07 to -0.55), respectively], less-gelatinized starch [SMD = -0.54 mmol/L*min (95% CI: -0.75 to -0.34) and SMD = -0.48 pmol/L*min (95% CI: -0.75 to -0.21), respectively], retrograded starch (for glucose incremental AUC; SMD = -0.46 pmol/L*min; 95% CI: -0.80 to -0.12), and intact and large particles [SMD = -0.43 mmol/L*min (95% CI: -0.58 to -0.28) and SMD = -0.63 pmol/L*min (95% CI: -0.86 to -0.40), respectively]. All analyses showed minor or moderate heterogeneity (I2 < 50%). Sufficient evidence was not found to suggest how these structural factors influence appetite. CONCLUSIONS: The manipulation of microstructures in starchy food may be an effective way to improve postprandial glycemia and insulinemia in the healthy population. The protocol for this systematic review and meta-analysis was registered in the international prospective register of systematic reviews (PROSPERO) as CRD42020190873.

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Crossref · 10.1093/ajcn/nqab098

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  • Two meals containing the same amount of carbohydrate can elicit different glycemic responses because of differences in food structure, processing, starch fractions, and non-carbohydrate components.

    “two meals containing the same amount of carbohydrate can elicit different glycemic responses because of differences in food structure, processing, starch fractions (rapidly available vs. slowly available), and the effect of non-carbohydrate components (fat, protein, fiber) on gastric emptying and intestinal digestion [4,5,6,7].”

    From Does Resistant Starch Formed by Cooling Pasta Decrease the Postprandial Glycemic Response in Type 1 Diabetes? A Randomized Single-Blind Crossover Study (2026) · cites this paper as [4]

    The Discussion (Overall summary and Relevance of this systematic review; page unavailable) says starchy foods with similar nutrient composition can produce different glycemic responses because of structure, processing, and starch-related factors. It also names dietary fiber as a possible contributor to variation. The paper does not establish the sentence’s further claim that fat, protein, and fiber alter glycemic responses through effects on gastric emptying and intestinal digestion. (LLM, conf=0.85)

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  • Matching insulin action to the time course of glucose appearance after meals remains challenging, particularly with starchy foods.

    “matching insulin action to the time course of glucose appearance after meals remains challenging, particularly with starchy foods [3,4].”

    From Does Resistant Starch Formed by Cooling Pasta Decrease the Postprandial Glycemic Response in Type 1 Diabetes? A Randomized Single-Blind Crossover Study (2026) · cites this paper as [4]

    The Introduction (page unavailable) says the rate of starch digestion affects postprandial glucose responses, and the Discussion, “Food structure and glucose and insulin response” (page unavailable), links digestion rate to both glucose and insulin responses. These passages support the relevance of starchy foods, but they do not say that matching insulin action to the timing of glucose appearance is challenging. (LLM, conf=0.84)

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Authors
Cai, M., Dou, B., Pugh, J. E., Lett, A. M., & Frost, G. S.
Affiliations
Imperial College London (GB)
Corresponding author
Frost, Gary S
Venue
The American Journal of Clinical Nutrition
Publisher
Elsevier BV
Published
2021-08
Volume
114
Issue
2
Pages
472-487
ISSN
0002-9165 (ISSN-L)
OpenAlex
W3164391466
Cited by
72
References
65
Citations by year
2026: 20 · 2025: 15 · 2024: 13 · 2023: 13 · 2022: 10 · 2021: 1
FWCI
1.23
Type
journal article
Language
en
Open access
Locations
  • American Journal of Clinical Nutrition (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Spiral (Imperial College London) (submittedVersion, other-oa)
Funders
  • China Scholarship Council
  • NIHR Imperial Biomedical Research Centre
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Food composition and properties
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Potato Plant Research
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Natural Antidiabetic Agents Studies
Keywords
postprandial glycemic response, postprandial insulin response, appetite regulation, satiety, amylose/amylopectin ratio, starch gelatinization, starch retrogradation, starch-protein interactions, starch granule size, food texture, type 2 diabetes risk, obesity risk, healthy adults
MeSH terms
Blood Glucose, Dietary Carbohydrates, Food Analysis, Humans, Starch, Postprandial Period

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