Cited by 27Food composition and propertiesNutritional Studies and DietDiabetes, Cardiovascular Risks, and Lipoproteins

Role of Whole Grain Consumption in Glycaemic Control of Diabetic Patients: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

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Xu, Dengfeng, Fu, Lingmeng, Pan, Da, Lu, Yifei, Yang, Chao, Wang, Yuanyuan, Wang, Shaokang, Sun, Guiju·2021·Nutrients

Abstract

Background: Observational studies have indicated beneficial effects of whole grain consumption on human health. However, no evidence based on randomized controlled trials has been established. Our objective was to perform a systematic review and meta-analysis of randomized controlled trials to assess the effects of whole grain consumption in glycaemic control of diabetic patients. Methods: A comprehensive search in four databases (Web of Science, Pubmed, Scopus and Cochrane library) was conducted to collect potential articles which measured the roles of whole grain consumption on glycaemic control up to October 2021. Results: A total of 16 eligible trials involving 1068 subjects were identified to evaluate the pooled effect. The overall results indicated that compared with the control group, whole grain intake presented a significantly reduced concentration in fast plasma glucose (WMD = −0.51 mmol/L, 95% CI: −0.73, −0.28; I2 = 88.6%, p < 0.001), a homeostasis model assessment of insulin resistance (WMD = −0.39 μU × mol/L2, 95% CI: −0.73, −0.04; I2 = 58.4%, p = 0.014), and glycosylated haemoglobin (WMD = −0.56%, 95% CI: −0.88, −0.25, I2 = 88.5%, p < 0.001), while no significant difference was observed in fast plasma insulin level between groups (SMD = −0.05, 95% CI: −0.25, 0.14; I2 = 40.7%, p = 0.120). In terms of incremental area under the curve (iAUC), data suggested that whole grain effected a significant decrease in Glucose-iAUC (WMD = −233.09 min × mmol/L, 95% CI: −451.62, −14.57; I2 = 96.1%, p < 0.001) and Insulin-iAUC (SMD = −4.80, 95% CI: −8.36, −1.23; I2 = 89.9%, p = 0.002), although only in a small number of studies. Of note, there is evidence for modest unexplained heterogeneity in the present meta-analysis. Conclusion: Whole grain consumption confers a beneficial effect on glucose metabolism in patients with diabetes. Regrettably, since relevant studies were scarce, we failed to provide confident evidence of whole grain consumption on acute effects including Glucose-iAUC and Insulin-iAUC, which should be addressed in further trials.

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Authors
Xu, D., Fu, L., Pan, D., Lu, Y., Yang, C., Wang, Y., Wang, S., & Sun, G.
Affiliations
  • Southeast University (CN)
  • Zhejiang Provincial People's Hospital (CN)
  • Key Laboratory of Environmental Medicine and Engineering of Ministry of Education, Department of Nutrition and Food Hygiene, School of Public Health, Southeast University, Nanjing 210009, China
Corresponding author
Sun, Guiju
Venue
Nutrients
Publisher
MDPI AG
Published
2021-12-27
Volume
14
Issue
1
Pages
109
ISSN
2072-6643 (ISSN-L)
OpenAlex
W4200577045
Cited by
27
References
60
Citations by year
2026: 4 · 2025: 8 · 2024: 6 · 2023: 4 · 2022: 5
FWCI
0.50
Type
journal article
Language
en
Open access
Locations
  • Nutrients (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Postgraduate Research&Practice Innovation Program of Jiangsu Province (KYCX21-0164)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Food composition and properties
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutritional Studies and Diet
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
whole grain intake, glycemic control, diabetes mellitus, fasting blood glucose, insulin resistance, HbA1c, insulin, incremental area under the curve, dietary intervention, glycemic index, glycemic load
MeSH terms
Whole Grains, Glycemic Control, Blood Glucose, Diabetes Mellitus, Diet, Humans

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