Daily, Long-Term Intermittent Fasting for the Prevention of PSA-Recurrence in Patients With Localized Prostate Cancer After Radical Prostatectomy

PRIMARY OBJECTIVES: I. To determine whether men treated for localized prostate cancer adhere to a long-term (months-years) daily intermittent fasting regimen. II. To measure the levels of metabolic and prostate-cancer derived microparticles in the serum of men that practice a daily intermittent fasting regimen after treatment for localized, high-risk prostate cancer. OUTLINE: Beginning when patients' PSA is detectable up to 24 months after surgery, patients follow a daily intermittent fasting routine consisting of restricting the daily eating period to 8 hours (e.g. between 1PM-9PM) followed by 16 hours of prolonged nightly fasting for up to 1 year or until secondary therapy commences.