Recurrent Prostate Cancer

Stage IV Prostate Cancer

On day 0 or day 70 pharmacokinetic study of isoflavones over 24 hours will follow after consumption of 2 slices of soy bread. Afterwards 2 slices of soy bread/day will be consumed for 56 days and isoflavone metabolites will be assessed in urine at days 0, 28, 56, 70, 98, and 126.

Arm I Soy Bread

On day 0 or day 70 pharmacokinetic study of isoflavones over 24 hours will follow after consumption of 2 slices of soy-almond bread. Afterwards 2 slices of soy-almond bread/day will be consumed for 56 days and isoflavone metabolites will be assessed in urine at days 0, 28, 56, 70, 98, and 126.

Arm II Soy-Almond Bread

The Ohio State University Medical Center

Soy Isoflavones in Treating Patients With Recurrent Prostate Cancer or Rising Prostate-Specific Antigen

Bioavailability of Isoflavones Delivered by Soy Almond Bread in Men With Recurring Prostate Cancer and Rising Prostate Specific Antigen

Quantification of absorption, serum concentrations over time, and excretion patterns of soy isoflavones and metabolites to define relationships between dietary intake, isoflavone metabolism and the biological outcomes

Comparison of hormonal patterns (lower insulin like growth factor-I, increased insulin like growth factor binding protein-3, lower androgens), prostate specific antigen velocity, and circulating vascular endothelial growth factor concentrations

Comparison of isoflavone metabolites on blood hormonal patterns and biomarkers that favor anti-prostate cancer activity.

Safety (NIH criteria) and toxicity will be measured at day 0 (start of first intervention), day 56 (end of first intervention), day 70 (start of second intervention), and day 126 (end of second intervention)

beta glucosidase/neoplasms

Soy Isoflavones in Treating Patients With Recurrent Prostate Cancer or Rising Prostate-Specific Antigen

Reproducibility of a Fecal Occult Blood Test Device for Gut Microbiota Analyses

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