Effects of garlic extract on lipid profile in patients with coronary artery disease: A systematic review and meta-analysis of randomised clinical trials

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#cholesterol-hdl #coronary-artery-disease #garlic #humans #lipids

Effects of garlic extract on lipid profile in patients with coronary artery disease: A systematic review and meta-analysis of randomised clinical trials

Kheirmandparizi et al., 2021 | Int J Clin Pract | Meta Analysis

Citation

Kheirmandparizi Maryam, Keshavarz Pedram, ... Alkamel Abdolhamid. Effects of garlic extract on lipid profile in patients with coronary artery disease: A systematic review and meta-analysis of randomised clinical trials. Int J Clin Pract. 2021-Dec;75(12):e14974. doi:10.1111/ijcp.14974

Abstract

This meta-analysis was conducted to evaluate the effects of garlic extract on total cholesterol (TC), triglycerides (TG), low-density lipoprotein-cholesterol (LDL-c) and high-density lipoprotein-cholesterol (HDL-c), among the patients with coronary artery disease (CAD). Literature searches were conducted in EMBASE, Scopus, PubMed, Web of Science and Cochrane Library until Sep18th, 2020. Inter-study heterogeneity was examined using Cochrane's Q and I2 tests. The random-effect models were utilised to pool the weighted mean differences (WMDs) and the corresponding 95% confidence intervals (CIs). Six articles were enrolled in the current meta-analysis. Garlic consumption significantly reduced TC levels (WMD -16.32 mg/dL; 95% CI -31.22, -1.43; P = .032). We found no significant effects on TG (WMD -10.93 mg/dL; 95% CI -26.19, 4.32; P = .160), HDL-c (WMD 4.55 mg/dL; 95% CI -1.13, 10.23; P = .116) and LDL-c concentrations (WMD -3.65 mg/dL; 95% CI -13.21, 5.92; P = .455). Significant heterogeneity was observed for HDL-c (I2  = 76.8%). However, the findings of sensitivity analysis revealed that upon exclusion of the potential heterogeneity source, the pooled WMD on HDL-c levels were stable. Garlic supplementation may result in a decrease in TC, but will not affect TG, HDL-c and LDL-c levels among CAD patients.

Key Findings

Garlic supplementation may result in a decrease in TC, but will not affect TG, HDL-c and LDL-c levels among CAD patients.

Outcomes Measured

  • Requires manual extraction

Population

Field Value
Population coronary artery disease
Sample Size See abstract
Age Range See abstract
Condition See abstract

MeSH Terms

  • Cholesterol, HDL
  • Coronary Artery Disease
  • Garlic
  • Humans
  • Lipids
  • Plant Extracts
  • Randomized Controlled Trials as Topic
  • Triglycerides

Evidence Classification

  • Level: Meta Analysis
  • Publication Types: Meta-Analysis, Systematic Review, Journal Article
  • Vertical: garlic

Provenance

Source extracted via PubMed E-utilities API on 2026-04-09