Inclusion Criteria:

- Males, between the ages of 50 and 80

- Diagnosed with grade 1-2 prostate cancer (Gleason Score 2 to 6) Note: patients with a
Gleason primary pattern 4 (4+1 or 4+2) are not eligible.

- No prior or current therapy for prostate cancer

- No other history of cancer except non-melanoma skin cancer

- No known history of hepatic and/or renal disease

- No evidence of prostatitis or urinary tract infection (men being treated with
antibiotics may be enrolled 30 days after completion of therapy given that they still
meet all other eligibility criteria)

- No antibiotic use within 30 days of registration

- Close to ideal body weight(Body Mass Index no greater than 32 Kg/m²)

- Omnivorous diet

- Able and willing to give written consent

Exclusion Criteria:

- Less than 50 years or over 80 years of age

- Prostate cancer beyond grade 2 (Gleason Score greater than 6)

- Gleason primary pattern 4 (4+1 or 4+2)

- Prior or planned treatment for prostate cancer of any stage

- Prior history of other cancer except non-melanoma skin cancer

- Current use of nutritional supplements, including modular supplements of other agents
with antioxidant properties e.g. retinoids, beta-carotene, and isoflavones

- Allergy to study agent

- Known history of hepatic or renal disease

- Body Mass Index greater than 32 Kg/m²

- Vegetarian/vegan diet

- Diet high in soy products (men who routinely consume a diet high in soy products may
be enrolled 30 days after eliminating soy product from the diet)

- Prostatitis or urinary tract infection

- Treatment with antibiotics within 30 days of registration