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Polycystic Ovarian Syndrome: Impact of Flaxseed Supplementation

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00693082
Recruitment Status : Terminated (recruitment and pilot funding issues)
First Posted : June 6, 2008
Last Update Posted : November 20, 2012
Information provided by (Responsible Party):
Duke University

Tracking Information
First Submitted Date  ICMJE June 3, 2008
First Posted Date  ICMJE June 6, 2008
Last Update Posted Date November 20, 2012
Study Start Date  ICMJE August 2007
Actual Primary Completion Date June 2009   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures  ICMJE
 (submitted: June 5, 2008)
To explore the effects of flaxseed supplementation on women with clinically confirmed PCOS. [ Time Frame: baseline, 12 weeks, 24 weeks ]
Original Primary Outcome Measures  ICMJE Same as current
Change History
Current Secondary Outcome Measures  ICMJE Not Provided
Original Secondary Outcome Measures  ICMJE Not Provided
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title  ICMJE Polycystic Ovarian Syndrome: Impact of Flaxseed Supplementation
Official Title  ICMJE Polycystic Ovarian Syndrome: Impact of Flaxseed Supplementation
Brief Summary The overall aim of this study is to explore the effects of flaxseed supplementation and determine whether it is a feasible and potentially effective dietary intervention among women with polycystic ovarian syndrome (PCOS). Women, ages 18-45, with clinically confirmed PCOS (N=20) will be scheduled for baseline measures and then instructed and given supplies necessary to follow a flaxseed supplemented (30 g/day) diet for a period of three months, whereupon follow-up measures will be taken. Subjects will be asked to resume their typical (unsupplemented) diet for another three months and a second set of follow-up measures will be taken. Baseline levels of bioavailable and total testosterone, fasting insulin, glucose, and triglycerides (TG), total/LDL/HDL cholesterol, body weight, degree of hirsutism and acne, and menstrual cyclicity will be compared to levels at 3 and 6 month follow-up. The overall hypothesis (based upon our work in men at risk for prostate cancer and data from one case-study conducted in a woman with confirmed PCOS) is that during the time women receive flaxseed supplementation they will experience reduced serum levels of testosterone, and total and LDL cholesterol, as well as clinical evidence of hirsutism. Given the pilot nature of this study, statistical analyses will be limited to simple descriptive statistics. We have observed no negative side effects, other than minor gastro-intestinal occurrences (i.e., temporary increased flatulence, borborygmi, increased number of stools, etc.) associated with flaxseed supplementation in our previous studies either with short or long-term use. Flaxseed supplementation will be discontinued if indicated and the events reported to the institutional review board.
Detailed Description Not Provided
Study Type  ICMJE Interventional
Study Phase  ICMJE Phase 2
Study Design  ICMJE Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Condition  ICMJE Polycystic Ovarian Syndrome
Intervention  ICMJE Dietary Supplement: flaxseed
1 tablespoon a day for first three days, increasing to two tablespoons a day for the next three days. On the 7th day start with 3 tablespoons per day and maintain dose throughout the duration of the study (11 weeks).
Study Arms  ICMJE Experimental: 1
Intervention: Dietary Supplement: flaxseed
Publications * Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Terminated
Actual Enrollment  ICMJE
 (submitted: November 19, 2012)
Original Estimated Enrollment  ICMJE
 (submitted: June 5, 2008)
Actual Study Completion Date  ICMJE June 2009
Actual Primary Completion Date June 2009   (Final data collection date for primary outcome measure)
Eligibility Criteria  ICMJE

Inclusion Criteria:

  • limited to women aged 18-45
  • diagnosis of PCOS by menstrual irregularity (fewer than 9 menses annually), Ferriman-Gallwey score > 8, and/or hyperandrogenemia defined as bioavailable T>8.4ng/dL (Zawdaki & Dunaif 1992)
  • mentally competent
  • English speaking/writing
  • telephone access and/or email access

Exclusion Criteria:

  • Use of oral contraceptives, spironolactone or insulin-sensitizing agents within the past 3 months;
  • Long-term or chronic use of oral antibiotics;
  • Diagnoses of hyperprolactinemia, thyroid abnormalities, or nonclassic adrenal hyperplasia;
  • Hysterectomy;
  • Onset of menopause;
  • Pregnancy/Lactation;
  • Consumption of flaxseed within the past month; and
  • Use of any dietary fiber supplements which are newly started (within the past 6 months) and agreement not to use any new fiber supplements during the study period
Sex/Gender  ICMJE
Sexes Eligible for Study: Female
Ages  ICMJE 18 Years to 45 Years   (Adult)
Accepts Healthy Volunteers  ICMJE Yes
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE United States
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT00693082
Other Study ID Numbers  ICMJE Pro00000854
Has Data Monitoring Committee Yes
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement  ICMJE Not Provided
Current Responsible Party Duke University
Original Responsible Party Susan Schneider, PhD, Duke University School of Nursing
Current Study Sponsor  ICMJE Duke University
Original Study Sponsor  ICMJE Same as current
Collaborators  ICMJE Not Provided
Investigators  ICMJE
Principal Investigator: Susan M Schneider, PhD Duke University
PRS Account Duke University
Verification Date November 2012

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP