SYSTEMATIC REVIEW article
Front. Endocrinol.
Sec. Clinical Diabetes
Volume 16 - 2025 | doi: 10.3389/fendo.2025.1572613
The Effect of Melatonin Supplementation on Glycemic Control in Patients with Type 2 Diabetes
Provisionally accepted
- 1Shandong University of Traditional Chinese Medicine, Jinan, China
- 2Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, Shandong Province, China
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BACKGROUND AND PURPOSE: Melatonin supplementation has shown potential benefits in the management of diabetes in clinical trials; however, prior meta-analyses have not specifically focused on individuals with type 2 diabetes mellitus (T2DM). This study investigates the efficacy of melatonin supplementation in improving glycemic control among patients with T2DM by systematically reviewing and analyzing data from randomized controlled trials (RCTs).METHODS: A comprehensive literature search was conducted in PubMed, Cochrane Library, Scopus, Web of Science, and Embase from their inception to September 2024. RCTs evaluating the effects of melatonin supplementation in adults diagnosed with T2DM were included. The methodological quality of the studies was assessed using the Cochrane Risk of Bias Tool. Data were synthesized and analyzed using RevMan version 5.3. RESULTS: A total of nine RCTs were included in the meta-analysis (n=9). These studies collectively involved 427 participants. Melatonin supplementation was associated with a statistically significant reduction in glycated hemoglobin (HbA1c) levels compared to placebo [mean difference [MD]: -0.65; 95% CI: -1.28, -0.02; P = 0.04], However, no significant effect was observed on fasting plasma glucose (FPG) levels [mean difference: -6.40; 95% CI: -15.79, 2.99; P = 0.18]. CONCLUSION: This meta-analysis suggests that melatonin supplementation significantly reduces HbA1c levels in patients with type 2 diabetes mellitus compared to placebo, indicating potential benefits for long-term glycemic control. However, no significant effect was observed on FPG levels.
Keywords: Melatonin, Fasting plasma glucose, Glycosylated hemoglobin, type 2 diabetes mellitus, T2DM
Received: 07 Feb 2025; Accepted: 20 Jun 2025.
Copyright: © 2025 Sun, Lv, Ai, Zhang and Lu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Dongbin Zhang, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, Shandong Province, China
Hongxiu Lu, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, Shandong Province, China
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