title: Coenzyme Q10 Intake From Food and Semen Parameters in a Subfertile Population.
abstract: To assess the association between coenzyme Q10 (CoQ10) intake from food sources and semen quality. We assessed this association in a prospective cohort of men attending a fertility clinic. CoQ10 supplementation has been associated with improvements in semen parameters. However, the impact of CoQ10 intake from food sources on semen quality has not been investigated.
  
  
  
  Subfertile couples seeking fertility evaluation at the Massachusetts General Hospital Fertility Center were invited to participate in an ongoing study of environmental factors and fertility. In total, 211 male participants completed a validated food frequency questionnaire and provided 476 semen samples. Multivariable linear mixed models were used to examine the relation between CoQ10 intake from food and semen parameters while adjusting for potential confounders and accounting for within-person correlations.
  
  
  
  Mean dietary CoQ10 intake was 19.2 mg/day (2.4-247.2 mg/day). No subjects were taking CoQ10 supplements. There were no associations between dietary CoQ10 intake from food and conventional semen parameters. The adjusted mean difference (95% confidence interval) comparing men in the top and bottom quartiles of CoQ10 intake from food were -3.1 mil/mL (95% confidence interval -29.5, 38.8 mil/mL) for sperm concentration, -4.5% (-15.1%, 6.0%) for total motility, -1.3% for progressive motility (-8.4%, 5.7%), and 0.3% (-1.4%, 2.0%) for sperm morphology.
  
  
  
  CoQ10 intake from food was not related to semen parameters among subfertile men. Mean dietary intake of CoQ10 in this study was 10-fold lower than the supplemental dose used in clinical trials showing improved sperm motility. CoQ10 intake from food alone may be insufficient to optimize semen parameters.
authors.affiliation: Division of Urology, Hospital das Clínicas, University of Sao Paulo Medical School, Sao Paulo, Brazil.
authors.forename: Bruno C
authors.initials: BC
authors.lastname: Tiseo
authors.affiliation: Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA.
authors.forename: Audrey J
authors.initials: AJ
authors.lastname: Gaskins
authors.affiliation: Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA; Vincent Obstetrics and Gynecology, Massachusetts General Hospital, Boston, MA; Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA.
authors.forename: Russ
authors.initials: R
authors.lastname: Hauser
authors.affiliation: Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA.
authors.forename: Jorge E
authors.initials: JE
authors.lastname: Chavarro
authors.affiliation: Department of Urology, Massachusetts General Hospital, Boston, MA. Electronic address: ctanrikut@partners.org.
authors.forename: Cigdem
authors.initials: C
authors.lastname: Tanrikut
mesh_terms: D000328:Adult; D019587:Dietary Supplements; D005502:Food; D006801:Humans; D007248:Infertility, Male / Q000178:diet therapy*; D008297:Male; D011446:Prospective Studies; D055101:Semen Analysis; D014451:Ubiquinone / Q000031:analogs & derivatives* / Q000627:therapeutic use; D014815:Vitamins / Q000627:therapeutic use*
chemical_list: D014815:Vitamins; D014451:Ubiquinone; C024989:coenzyme Q10