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Abstract Title:

Effect of garlic supplementation on serum C-reactive protein level: A systematic review and meta-analysis of randomized controlled trials.

Abstract Source:

Phytother Res. 2019 Feb ;33(2):243-252. Epub 2018 Oct 29. PMID: 30370629

Abstract Author(s):

Mohsen Taghizadeh, Zahra Hamedifard, Sadegh Jafarnejad

Article Affiliation:

Mohsen Taghizadeh

Abstract:

The present study was designed to systematically review randomized controlled trials (RCTs) that report on the effects of garlic supplementation on serum C-reactive protein (CRP) levels. We conducted a literature search of Scopus, PubMed, Cochrane Library, and Google Scholar up to January 2018. Weighted mean differences (WMD) were estimated for net change in serum CRP. Subgroup analyses were also performed by duration of study, dose of supplementation, baseline CRP level, and the quality of studies. From 438 articles found and screened in our initial search, nine RCTs with the sum of total sample size of 363 were included in the meta-analysis. Compared with the controls, garlic intake significantly reduced the concentrations of serum CRP by 0.8 mg/L (95% CI [-1.5, -0.1], p = 0.02) with the evidence of heterogeneity among studies. Subgroup analyses showed that garlic significantly lowered CRP by 0.82 mg/L (95% CI [-1.02, -0.62], p < 0.001) among studies with a daily garlic dose ≥1,200 mg/day and by 2.44 mg/L (95% CI [-4.02, -0.87], p = 0.002) among studies with baseline CRP ≥2 mg/L. Current data confirmed that garlic supplementation would reduce serum CRP levels. However, the changes were related to the supplementaldoses and baseline levels of serum CRP.

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