meta analyses: curcumin and blood lipid levels

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meta analyses: curcumin and blood lipid levels

Postby jimmylegs » Mon Oct 08, 2018 5:05 am

A systematic review and meta-analysis of randomized controlled trials investigating the effects of curcumin on blood lipid levels (2014)
https://www.sciencedirect.com/science/a ... 1413002501

Summary
Background & aims
Curcumin is a polyphenolic natural compound with diverse and attractive biological activities. There has been in-vitro, preclinical and clinical evidence on the cardioprotective and lipid-lowering effects of curcumin. The present review aimed to systematically review and meta-analyze current clinical evidence on the effects of curcumin supplementation on blood lipids.

Methods
A comprehensive literature search in Medline, Scopus, AMED, Cochrane and clinical trial registry databases was performed to identify randomized controlled trials investigating the effect of curcumin on any component of serum lipid profile including total cholesterol, low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C) and triglycerides. Meta-analysis of eligible studies was conducted using a random-effects approach.

Results
Five studies comprising 10 treatment arms (n = 133 in the curcumin and 90 in the control group) fulfilled the inclusion criteria. Meta-analysis of findings did not indicate a significant effect of curcumin on any of the lipid parameters. The estimated pooled mean changes (95% confidence interval) following curcumin supplementation were 8.97 (95% CI: −4.56 to 22.51) mg/dL (for total cholesterol; p = 0.19); 16.15 (−4.43 to 36.74) mg/dL (for LDL-C; p = 0.12); −0.59 (−1.66 to 0.49) mg/dL (for HDL-C; p = 0.28) and −1.29 (−9.05 to 6.48) mg/dL (for triglycerides; p = 0.75). In the same manner, subgroup analysis of studies on patients at cardiovascular risk did not indicate any significant effect of curcumin on circulating lipid levels. There was a significant heterogeneity for the impact of curcumin on total cholesterol, LDL-C and triglycerides but not HDL-C.

Conclusions
In light of the present meta-analysis, curcumin supplementation has apparently no effect on serum total cholesterol, LDL-C, triglycerides and HDL-C levels when considering heterogeneous populations. However, further randomized controlled trials with longer supplementation duration, and bioavailability-improved formulations of curcumin are warranted to be conducted in dyslipidemic subjects for a more robust assessment of the lipid-modulating properties of this phytochemical.
take control of your own health
pursue optimal self care at least as actively as a diagnosis
ask for referrals to preventive health care specialists eg dietitians
don't let suboptimal self care muddy any underlying diagnostic picture!
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jimmylegs
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Re: meta analyses: curcumin and blood lipid levels

Postby jimmylegs » Mon Oct 08, 2018 5:11 am

would be interesting to have a look at any particular inclusion criteria for this one, in comparison to the above

Lipid-modifying activity of curcuminoids: A systematic review and meta-analysis of randomized controlled trials (2017)
https://www.tandfonline.com/doi/abs/10. ... 17.1396201

ABSTRACT
Objective: The aim of this systematic review and meta-analysis was to determine and clarify the impact of curcuminoids on serum lipid levels. Methods: Randomized controlled trials (RCTs) investigating the effects of curcuminoids on plasma lipids were searched in PubMed-Medline, Scopus, Web of Science databases (from inception to April 3rd, 2017). A random-effects model and generic inverse variance method were used for quantitative data synthesis. Sensitivity analysis was conducted using the leave-one-out method. A weighted random-effects meta-regression was performed to evaluate the impact of potential confounders on lipid concentrations. Results: A meta-analysis of 20 RCTs with 1427 participants suggested a significant decrease in plasma concentrations of triglycerides (WMD: −21.36 mg/dL, 95% CI: −32.18, −10.53, p < 0.001), and an elevation in plasma HDL-C levels (WMD: 1.42 mg/dL, 95% CI: 0.03, 2.81, p = 0.046), while plasma levels of LDL-C (WMD: −5.82 mg/dL, 95% CI: −15.80, 4.16, p = 0.253) and total cholesterol (WMD: −9.57 mg/dL, 95% CI: −20.89, 1.75, p = 0.098) were not altered. The effects of curcuminoids on lipids were not found to be dependent on the duration of supplementation. Conclusion: This meta-analysis has shown that curcuminoid therapy significantly reduces plasma triglycerides and increases HDL-C levels.
take control of your own health
pursue optimal self care at least as actively as a diagnosis
ask for referrals to preventive health care specialists eg dietitians
don't let suboptimal self care muddy any underlying diagnostic picture!
User avatar
jimmylegs
Volunteer Moderator
 
Posts: 11704
Joined: Sat Mar 11, 2006 4:00 pm


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