title: The effects of coenzyme Q10 supplementation on glucose metabolism and lipid profiles in women with polycystic ovary syndrome: a randomized, double-blind, placebo-controlled trial.
abstract: BACKGROUND
  Data on the effects of coenzyme Q10 (CoQ10) supplementation on metabolic profiles among subjects with polycystic ovary syndrome (PCOS) are scarce.
  
  
  OBJECTIVE
  This study was carried out to evaluate the effects of CoQ10 supplementation on glucose metabolism and lipid profiles in subjects with PCOS.
  
  
  METHODS
  This randomized, double-blind, placebo-controlled trial was conducted on 60 women diagnosed with PCOS. Subjects were randomly assigned into two groups to intake either 100 mg CoQ10 supplements (N = 30) or placebo (N = 30) per day for 12 weeks. Markers of insulin metabolism and lipid profiles were assessed at first and 12 weeks after the intervention.
  
  
  RESULTS
  After 12 weeks of intervention, compared to the placebo, subjects who received CoQ10 supplements had significantly decreased fasting plasma glucose (-0·24 ± 0·51 vs +0·01 ± 0·44 mmol/l, P = 0·04), serum insulin concentrations (-7·8 ± 14·4 vs +6·0 ± 15·0 pmol/l, P < 0·001), the homeostasis model of assessment-estimated insulin resistance (-0·3 ± 0·6 vs +0·2 ± 0·6, P = 0·001), the homeostasis model of assessment-estimated B-cell function (-5·4 ± 9·5 vs +4·5 ± 9·9, P < 0·001) and increased the quantitative insulin sensitivity check index (+0·006 ± 0·009 vs -0·006 ± 0·01, P < 0·001). In addition, changes in serum total- (-0·10 ± 0·48 vs +0·19 ± 0·50 mmol/l, P = 0·02) and LDL-cholesterol concentrations (-0·15 ± 0·40 vs +0·14 ± 0·49 mmol/l, P = 0·01) in supplemented women were significantly different from those of women in the placebo group. When we adjusted the analysis for baseline values of biochemical parameters, age and baseline BMI, serum LDL-cholesterol (P = 0·05) became nonsignificant, and other findings did not alter.
  
  
  CONCLUSIONS
  Overall, CoQ10 supplementation for 12 weeks among subjects with PCOS had beneficial effects on glucose metabolism, serum total- and LDL-cholesterol levels.
authors.affiliation: Department of Gynecology and Obstetrics, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran.
authors.forename: Mansooreh
authors.initials: M
authors.lastname: Samimi
authors.affiliation: Department of Gynecology and Obstetrics, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Zarezade Mehrizi
authors.affiliation: Department of Gynecology and Obstetrics, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Foroozanfard
authors.affiliation: Department of Biostatistics and Epidemiology, Kashan University of Medical Sciences, Kashan, Iran.
authors.forename: Hossein
authors.initials: H
authors.lastname: Akbari
authors.affiliation: Endocrinology and Metabolism Research Center, Department of Gynecology and Obstetrics, School of Medicine, Arak University of Medical Sciences, Arak, Iran.
authors.forename: Mehri
authors.initials: M
authors.lastname: Jamilian
authors.affiliation: Department of Gynecology and Obstetrics, School of Medicine, Bushehr University of Medical Sciences, Bushehr, Iran.|Department of Gynecology and Obstetrics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Shahnaz
authors.initials: S
authors.lastname: Ahmadi
authors.affiliation: Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran.
authors.forename: Zatollah
authors.initials: Z
authors.lastname: Asemi
mesh_terms: D000328:Adult; D001786:Blood Glucose / Q000187:drug effects / Q000378:metabolism*; D008078:Cholesterol, LDL / Q000097:blood / Q000187:drug effects; D019587:Dietary Supplements; D004311:Double-Blind Method; D005260:Female; D006706:Homeostasis; D006801:Humans; D007328:Insulin / Q000097:blood; D008055:Lipids / Q000032:analysis*; D011085:Polycystic Ovary Syndrome / Q000097:blood / Q000188:drug therapy*; D014451:Ubiquinone / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000494:pharmacology; D055815:Young Adult
chemical_list: D001786:Blood Glucose; D008078:Cholesterol, LDL; D007328:Insulin; D008055:Lipids; D014451:Ubiquinone; C024989:coenzyme Q10