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Randomized Controlled Trial
. 2014 Oct;81(4):582-7.
doi: 10.1111/cen.12451. Epub 2014 Apr 15.

The Effects of Folate Supplementation on Inflammatory Factors and Biomarkers of Oxidative Stress in Overweight and Obese Women With Polycystic Ovary Syndrome: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial

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Randomized Controlled Trial

The Effects of Folate Supplementation on Inflammatory Factors and Biomarkers of Oxidative Stress in Overweight and Obese Women With Polycystic Ovary Syndrome: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial

Fereshteh Bahmani et al. Clin Endocrinol (Oxf). .

Abstract

Objective: This study was conducted to determine the effects of folate supplementation on inflammatory factors and biomarkers of oxidative stress among women with polycystic ovary syndrome (PCOS).

Design, patients and measurements: This randomized, double-blind, placebo-controlled clinical trial was conducted among 69 women diagnosed with PCOS and aged 18-40 year old. Participants were randomly assigned to three groups receiving the following: (1) folate-1: 1 mg/d folate supplements (N = 23); (2) folate-5: 5 mg/d folate supplements (N = 23) and (3) placebo (N = 23) for 8 weeks. Fasting blood samples were taken at the beginning of the study and after 8 weeks to measure homocysteine (Hcy), inflammatory factors including high-sensitivity C-reactive protein (hs-CRP), nitric oxide (NO), biomarkers of oxidative stress including total antioxidant capacity (TAC), glutathione (GSH), malondialdehyde (MDA) and homoeostatic model assessment-beta cell function (HOMA-B).

Results: Supplementation with 5 mg/d folate resulted in reduced plasma Hcy (-2·23 vs -1·86 and 1·16 μm, respectively, P < 0·05), HOMA-B (-7·63 vs 1·43 and 13·66, respectively, P < 0·05), serum hs-CRP (-212·2 vs -262·4 and 729·8 μg/l, respectively, P < 0·05) and plasma MDA concentrations (-0·48 vs -0·24 and 0·69 μm, respectively, P < 0·01) compared with folate-1 and placebo groups. Furthermore, a significant rise in plasma TAC (0·64 vs -3·53 and -215·47 mm, respectively, P < 0·01) and GSH levels (162·1 vs 195·8 and -158·2 μm, respectively, P < 0·01) was also observed following the administration of 5 mg/d folate supplements compared with folate-1 and placebo groups.

Conclusions: In conclusion, folate supplementation (5 mg/d) in women with PCOS had beneficial effects on inflammatory factors and biomarkers of oxidative stress.

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