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Sunday, 13 September 2015

Can red yeast rice and olive extract improve lipid profile and cardiovascular risk in metabolic syndrome?: a double blind, placebo controlled randomized trial


Veronique Verhoeven1*, Anastasia Van der Auwera2, Luc Van Gaal3, Roy Remmen1, Sandra Apers2, Michel Stalpaert4, Johan Wens1 and Nina Hermans2
1 Academic center for Primary and Interdisciplinary care, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
2 Natural Products and Food Research & Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Universiteitsplein 1, Antwerp, Belgium
3 Department of Endocrinology, Diabetology, and Metabolism, Faculty of Medicine, Antwerp University Hospital, 2650 Edegem, Antwerp, Belgium
4 Laboratory of Molecular and Clinical Pathology (RIATOL), AML, Sonic Healthcare Benelux, Emiel Vloorsstraat 9, Antwerp 2020, Belgium
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BMC Complementary and Alternative Medicine 2015, 15:52  doi:10.1186/s12906-015-0576-9
The electronic version of this article is the complete one and can be found online at: http://www.biomedcentral.com/1472-6882/15/52

Received:22 October 2014
Accepted:21 February 2015
Published:10 March 2015
© 2015 Verhoeven et al.; licensee BioMed Central.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

Abstract

Background

Metabolic syndrome (MetS) comprises a spectrum of clinical phenotypes in which dyslipidemia, dysglycemia and hypertension are clustered and where all share a high level of oxidative stress and an increased risk of cardiovascular disease. This study examines the effect of a nutritional supplement combining red yeast rice and olive fruit extract on the lipid profile and on oxidative stress in a population of patients with MetS.

Methods

In a double blind placebo controlled randomized trial, 50 persons with MetS, as defined by the ATPIII criteria, received the study product or placebo for 8 weeks. The study product contained 10.82 mg of monacolins and 9,32 mg of hydroxytyrosol per capsule, and is commercialized as Cholesfytol plus. The primary outcome measure was the difference in LDL reduction between intervention and control groups. Furthermore, differences in changes of CH, HDL, ApoA1, ApoB, HbA1c and oxLDL were measured, as well as side-effects, CK elevation, changes in clinical parameters and in cardiovascular risk.

Results

In the intervention group, LDL cholesterol was lowered by 24% whereas it increased by 1% in the control group (p < 0.001). Other effects observed were a change in total cholesterol (−17% in the intervention group vs +2% in the control group, p < 0.001), apolipoprotein B (−15% vs +6%, p < 0.001), and TG (−9% vs + 16%, p = 0.02). Oxidized LDL decreased by 20% vs an increase of 5% in the control group (p < 0.001). Systolic and diastolic arterial blood pressure decreased significantly by 10 mmHg (vs 0% in the control group, p = 0.001) and 7 mmHg (vs 0% in the control group, p = 0.05) respectively. One person in the intervention group, who suffered from Segawa’s syndrome, dropped out because of severe muscle ache.

Conclusions

The combination of active products in this study may be an alternative approach to statins in people who do not need, or cannot or do not want to be treated with chemical statins. Side effects, effects on oxidative stress and on glucose metabolism need to be examined more thoroughly.

Trial registration

Clinicaltrials.gov NCT02065180 webcite (February 2014).
Keywords:
Cardiovascular prevention; Metabolic syndrome; Statins; Red yeast rice; Olive; Cholesterol