Inclusion Criteria:

- Must be 18 to 40 year old female with:

- Diagnosis of PCOS by menstrual irregularity (fewer than 9 menses annually/interval
over 40 days), Ferriman-Galleway score >8, and/or hyperandrogenemia defined as total
testosterone >80ng/dl or bioavailable testosterone >8.4 ng/dl.

- Mentally competent.

Exclusion Criteria:

- Use of oral contraceptives, spironolactone, or insulin-sensitizing agents within the
past 2 months.

- Long-term or chronic use of oral antibiotics.

- Hysterectomy.

- FSH >15.

- Pregnancy/lactation.

- Consumption of flaxseed within the last month.

- Diagnosis of thyroid disease, nonclassical adrenal hyperplasia, and
hyperprolactinemia.

- 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.