Inclusion Criteria:

- confirmed adenocarcinoma of the prostate

- undergone definitive treatment (surgery, surgery with radiation therapy, cryotherapy,
radiation therapy or brachytherapy) for the primary prostate tumor with a rising PSA

- life expectancy greater than 6 months

- has Eastern Cooperative Oncology Group (ECOG) performance status 0, 1, or 2

- use of other dietary/herbal supplements (e.g. saw palmetto, selenium, etc.) has been
stable for at least 2 months prior to screening and the patient agrees not to stop or
change the dose while participating in the study.

- Adequate hepatic function with serum bilirubin ≤ 1.5 times the upper institutional
limits of normal, ALT and AST ≤ 2.5 times the upper institutional limits of normal

- Adequate renal function with serum creatinine ≤ 1.5 times the upper institutional
limits of normal

- Adequate hematologic function (absolute neutrophil counts ≥ 1,500 mm3 and platelets ≥
100,000 mm3)

- All electrolytes (including potassium, sodium, and serum or ionized calcium) must be
within normal limits

Exclusion Criteria:

- Patients with evidence of metastatic disease would be excluded, except for presence
of positive lymph nodes from the surgical pathology. Similarly, patients with
radiological evidence of lymph nodes < 2 cm that lack pathological confirmation would
be eligible

- Patients with a PSA doubling time of <6months at screening would be excluded

- Patients meeting Phoenix criteria for biochemical failure (nadir + ≥2ng/mL increase
in serum PSA) who wish additional conventional therapy

- Any concurrent malignancy other than adequately treated basal or squamous cell skin
cancer or superficial bladder cancer

- Any psychiatric or other disorders such as dementia that would prohibit the patient
from understanding or rendering informed consent or from fully complying with
protocol treatment and follow-up

- Inability to swallow capsules

- Patients with a known history of gastrointestinal disease, surgery or malabsorption
that could potentially impact the absorption of the study drug

- Patients requiring the use of a feeding tube

- Receipt of prior chemotherapy