Effect of omega-3 fatty acids supplementation on insulin resistance in women with polycystic ovary syndrome: Meta-analysis of randomized controlled trials

2017 ◽  
Vol 11 (2) ◽  
pp. 157-162 ◽  
Author(s):  
Alirez Sadeghi ◽  
Kurosh Djafarian ◽  
Hamed Mohammadi ◽  
Sakineh Shab-Bidar
Keyword(s):  
Insulin Resistance ◽  
Fatty Acids ◽  
Polycystic Ovary Syndrome ◽  
Polycystic Ovary ◽  
Meta Analysis ◽  
Controlled Trials ◽  
Omega 3 Fatty Acids ◽  
Omega 3 ◽  
Ovary Syndrome ◽  
Randomized Controlled

scholarly journals The Role of Vitamin D Oral Supplementation in Insulin Resistance in Women with Polycystic Ovary Syndrome: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

Nutrients ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1637 ◽  
Author(s):  
Karolina Łagowska ◽  
Joanna Bajerska ◽  
Małgorzata Jamka
Keyword(s):  
Systematic Review ◽  
Insulin Resistance ◽  
Vitamin D ◽  
Polycystic Ovary Syndrome ◽  
Fasting Glucose ◽  
Polycystic Ovary ◽  
Meta Analysis ◽  
Controlled Trials ◽  
Ovary Syndrome ◽  
Randomized Controlled

Objective: To evaluate the effect of vitamin D supplementation (alone or with co-supplementation) on insulin resistance in patients with polycystic ovary syndrome (PCOS). Methods: We performed a literature search of databases (Medline, Scopus, Web of Knowledge, Cochrane Library) and identified all reports of randomized controlled trials (RCTs) published prior to April 2018. We compared the effects of supplementation with vitamin D alone (dose from 1000 IU/d to 60,000 IU/week) or with co-supplements to the administration of placebos in women diagnosed with PCOS. The systematic review and meta-analysis protocol was registered in the International Prospective Register of Systematic Reviews (Prospero) as number CRD42018090572. Main results: Eleven of 345 identified studies were included in the analysis; these involved 601women diagnosed with PCOS. Vitamin D as a co-supplement was found to significantly decrease fasting glucose concentrations and the HOMA-IR value. HOMA-IR also declined significantly when vitamin D was supplemented with a dose lower than 4000 IU/d. Conclusions: Evidence from RCTs suggests that the supplementation of PCOS patients with continuous low doses of vitamin D (<4000 IU/d) or supplementation with vitamin D as a co-supplement may improve insulin sensitivity in terms of the fasting glucose concentration (supplementation with vitamin D in combination with other micronutrients) and HOMA-IR (supplementation with vitamin D in continuous low daily doses or as co-supplement).

scholarly journals Effects of Dietary Glycemic Index and Glycemic Load on Cardiometabolic and Reproductive Profiles in Women with Polycystic Ovary Syndrome: A Systematic Review and Meta-analysis of Randomized Controlled Trials

2020 ◽  
Author(s):  
Maryam Kazemi ◽  
Amir Hadi ◽  
Roger A Pierson ◽  
Marla E Lujan ◽  
Gordon A Zello ◽  
...  
Keyword(s):  
Systematic Review ◽  
Polycystic Ovary Syndrome ◽  
Glycemic Index ◽  
Polycystic Ovary ◽  
Meta Analysis ◽  
Glycemic Load ◽  
Controlled Trials ◽  
Ovary Syndrome ◽  
Randomized Controlled ◽  
Dietary Glycemic Index

ABSTRACT Women with polycystic ovary syndrome (PCOS) exhibit cardiometabolic (e.g., insulin resistance) and associated reproductive disruptions. Lifestyle modification (e.g., diet) is recommended as the first-line therapy to manage PCOS; however, a favorable dietary regimen remains unclear beyond energy restriction. We conducted a systematic review and meta-analysis of randomized controlled trials (RCTs) to summarize evidence on impacts of dietary glycemic index (GI) or glycemic load (GL) on cardiometabolic and reproductive profiles to update the International Evidence-based Guideline for the Assessment and Management of PCOS. Databases of MEDLINE, Cochrane, Web of Science, and Scopus were searched through 30 October 2019, and confirmed on 25 March 2020, to identify RCTs (≥8 wk) comparing the effects of diets with lower (LGI/LGL) and higher (HGI/HGL) GI/GL on glucoregulatory outcomes, lipid profile, anthropometrics, and androgen status in PCOS. The primary outcome was HOMA-IR. Data were pooled by random-effects models and expressed as weighted mean differences and 95% CIs. The risk of bias was assessed by the Cochrane tool. Ten RCTs (n = 403) were eligible. Eight evaluated LGI and 2 LGL diets. LGI diets decreased HOMA-IR (−0.78; −1.20, −0.37; I2 = 86.6%), fasting insulin (−2.39; −4.78, 0.00 μIU/mL; I2 = 76.8%), total cholesterol (−11.13; −18.23, −4.04 mg/dL; I2 = 0.0%), LDL cholesterol (−6.27; −12.01, −0.53 mg/dL; I2 = 0.0%), triglycerides (−14.85; −28.75, −0.95 mg/dL; I2 = 31.0%), waist circumference (−2.81; −4.40, −1.23 cm; I2 = 53.9%), and total testosterone (−0.21; −0.32, −0.09 nmol/L; I2 = 8.6%) compared with HGI diets (all: P ≤ 0.05) without affecting fasting glucose, HDL cholesterol, weight, or free androgen index (all: P ≥ 0.07). Some results were contradictory and only described narratively for 2 RCTs that evaluated LGL diets, since inclusion in meta-analyses was not possible. LGI diets improved glucoregulatory outcomes (HOMA-IR, insulin), lipid profiles, abdominal adiposity, and androgen status, conceivably supporting their inclusion for dietary management of PCOS. Further RCTs should confirm these observations and address whether LGI diets improve more patient-pressing complications, including ovulatory cyclicity, infertility, and cardiovascular disease risk in this high-risk population. This review was registered at www.crd.york.ac.uk/PROSPERO as CRD42020175300.

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