Efficacy and Safety of Nutrient Supplements for Glycaemic Control and Insulin Resistance in Type 2 Diabetes: An Umbrella Review and Hierarchical Evidence Synthesis

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dc.contributor.authorFong, C.
dc.contributor.authorAlesi, S.
dc.contributor.authorMousa, A.
dc.contributor.authorMoran, L.J.
dc.contributor.authorDeed, G.
dc.contributor.authorGrant, S.
dc.contributor.authorTapia, K.
dc.contributor.authorEe, C.
dc.date.issued2022
dc.description.abstractBackground: Nutrient supplements are widely used for type 2 diabetes (T2D), yet evidencebased guidance for clinicians is lacking. Methods: We searched the four electronic databases from November 2015–December 2021. The most recent, most comprehensive, high-ranked systematic reviews, meta-analyses, and/or umbrella reviews of randomised controlled trials in adults with T2D were included. Data were extracted on study characteristics, aggregate outcome measures per group (glycaemic control, measures of insulin sensitivity and secretion), adverse events, and Grading of Recommendations Assessment, Development, and Evaluation (GRADE) assessments. Quality was assessed using A Measurement Tool to Assess Systematic Reviews Version 2.0 (AMSTAR 2). Results: Twelve meta-analyses and one umbrella review were included. There was very low certainty evidence that chromium, Vitamin C, and omega-3 polyunsaturated fatty acids (W-3 PUFAs) were superior to placebo for the primary outcome of glycated hemoglobin (HbA1c) (Mean Difference/MD -0.54, -0.54 and ES -0.27, respectively). Probiotics were superior to placebo for HbA1c (Weighted Mean Difference/WMD -0.43%). There was very low certainty evidence that Vitamin D was superior to placebo for lowering HbA1c in trials of <6 months (MD -0.17%). Magnesium, zinc, Vitamin C, probiotics, and polyphenols were superior to placebo for FBG. Vitamin D was superior to placebo for insulin resistance. Data on safety was limited. Conclusions: Future research should identify who may benefit from nutrient supplementation, safety, and optimal regimens and formulations.
dc.description.statementofresponsibilityCharmie Fong, Simon Alesi, Aya Mousa, Lisa J. Moran, Gary Deed, Suzanne Grant, Kriscia Tapia, and Carolyn Ee
dc.identifier.citationNutrients, 2022; 14(11):2295-1-2295-20
dc.identifier.doi10.3390/nu14112295
dc.identifier.issn2072-6643
dc.identifier.issn2072-6643
dc.identifier.orcidMoran, L.J. [0000-0001-5772-6484]
dc.identifier.urihttps://hdl.handle.net/2440/135847
dc.language.isoen
dc.publisherMDPI
dc.rights© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
dc.source.urihttps://doi.org/10.3390/nu14112295
dc.subjecttype 2 diabetes; glycaemic control; insulin resistance; nutrients; umbrella review
dc.subject.meshHumans
dc.subject.meshDiabetes Mellitus, Type 2
dc.subject.meshInsulin Resistance
dc.subject.meshAscorbic Acid
dc.subject.meshVitamins
dc.subject.meshVitamin D
dc.subject.meshDietary Supplements
dc.subject.meshAdult
dc.subject.meshGlycated Hemoglobin A
dc.subject.meshNutrients
dc.subject.meshGlycemic Control
dc.subject.meshSystematic Reviews as Topic
dc.titleEfficacy and Safety of Nutrient Supplements for Glycaemic Control and Insulin Resistance in Type 2 Diabetes: An Umbrella Review and Hierarchical Evidence Synthesis
dc.typeJournal article
pubs.publication-statusPublished

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