PRIMARY OBJECTIVES:
1\) Investigate if caloric restriction will change serum micro ribonucleic acid (RNA) 21 (miR-21) expression in patients with prostate, endometrial or breast cancer.
SECONDARY OBJECTIVES:
1. Investigate measurable changes induced by caloric restriction on both patient (host) and tumor characteristics from caloric restriction.
2. Investigate the adherence of the patient to the diet.
4\) Weight, height, and body composition will be assessed via BodyMetrix. BodyMetrix uses ultrasound technology to measure subcutaneous fat.
5\) Patients will have psycho-social evaluation using the Functional Assessment of Cancer Therapy-Prostate (FACT-P) test (prostate cancer), FACT-Breast (B) test (breast cancer), or the FACT-Endometrial Cancer (En) test (endometrial cancer) and the Patient Reported Outcomes Measurement Information System (PROMIS) cancer fatigue short form at baseline, midway through diet, and at the conclusion of the diet.
6\) Patient's nutritional status (Mini Nutritional Assessment \[MNA\] form) will be assessed, and their caloric needs will be calculated.
7\) Local recurrence, progression free survival, distant metastases and overall survival will be assessed.
