They were only forbidden to partake of the Tree of Knowledge of Good and Evil. Some of the best information we have on the Tree of Life comes from I Nephi 11. Nephi is trying to obtain the interpretation of the dream his father had.
Factors that increase the risk of prostate cancer include: older age, a family history of the disease, and race. About 99% of cases occur in those over the age of 50. Having a first-degree relative with the disease increases the risk two to threefold.
Early prostate cancer usually causes no symptoms. More advanced prostate cancers sometimes cause symptoms, such as: Problems urinating, including a slow or weak urinary stream or the need to urinate more often, especially at night. Blood in the urine or semen.