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Effect of Green Tea Extract on Lipid Profile in Patients With Type 2 Diabetes Mellitus: A Systematic Review and Meta-Analysis Publisher Pubmed



Asbaghi O1 ; Fouladvand F1 ; Moradi S2, 3 ; Ashtarylarky D4 ; Choghakhori R5 ; Abbasnezhad A6
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Authors Affiliations
  1. 1. Student Research Committee, Lorestan University of Medical Sciences, Khorramabad, Iran
  2. 2. Halal Research Centre of IRI, FDA, Tehran, Iran
  3. 3. Department of Clinical Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. Nutrition and Metabolic Diseases Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
  5. 5. Razi Herbal Medicines Research Center, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
  6. 6. Nutritional Health Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran

Source: Diabetes and Metabolic Syndrome: Clinical Research and Reviews Published:2020


Abstract

Background: Previous studies have indicated controversial results regarding the efficacy of green tea extract (GTE) in improving the lipid profile of type 2 diabetes mellitus (T2DM) patients. We aimed to conduct a systematic review and meta-analysis to pool data from randomized controlled trials (RCTs). Methods: A systematic search was performed in Web of Science, PubMed, and Scopus databases, without any language and time restriction until August 2019, to retrieve the RCTs which examined the effects of GTE on serum concentrations of high-density lipoprotein (HDL), low-density lipoprotein (LDL), triglyceride (TG) or total cholesterol (TC) in T2DM patients. Meta-analyses were carried out using a random effects model. I2 index was used to evaluate the heterogeneity. Results: Initial search yielded 780 publications. Of these, seven studies were eligible. The supplementary intake of GTE improved lipid profile by reducing serum TG concentrations in patients with T2DM. Meanwhile, subgroup analyses based on duration of interventions (≤8 and > 8 weeks) and intervention dosage (≤800 and > 800 mg/day) showed that the GTE supplementation longer than 8 weeks and in doses >800 mg/day resulted in a significant decrease in serum TG concentrations. Furthermore, intervention longer than 8 weeks with doses lower than 800 mg/day resulted in a significant reduction in serum TC concentrations. Conclusion: In conclusion, present systematic review and meta-analysis revealed that the supplementary intake of GTE may improve lipid profile by reducing serum concentrations of TG in patients with T2DM. Furthermore, the results of our stratified analyses suggested that long-term GTE intervention may reduce serum concentrations of TG and TC. © 2020 Diabetes India
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