Lycopene In Preventing of Prostate Cancer

DISEASE CHARACTERISTICS: Normal healthy males judged to be in good medical condition based on history and physical exam confirming the absence of chronic medical conditions Baseline serum lycopene less than 600 nM PATIENT CHARACTERISTICS: Age: 18 to 45 Performance status: Karnofsky 100% Life expectancy: Not specified Hematopoietic: Hematologic function normal Hepatic: Liver function normal No hepatic disease Renal: Kidney function normal No renal disease Cardiovascular: No hypertension requiring medication No cardiovascular disease Normal EKG Other: No evidence of a psychiatric disorder Must be within 15% of ideal body weight based on standard weight tables No history of smoking within the past 3 months At least 72 hours since prior alcohol consumption and no history of alcohol abuse No history of gastrointestinal malabsorption or any other condition that could affect drug absorption No allergy to tomato based products No active malignancy at any site No illness that would pose a threat or additional risk (e.g., thyroid disease, diabetes mellitus) PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: Not specified Endocrine therapy: Not specified Radiotherapy: Not specified Surgery: Not specified Other: At least 14 days since prior prescription drugs No concurrent regular prescription medications At least 30 days since other prior experimental drugs No concurrent participation in any other experimental trial