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.
The exact cause of prostate cancer isn't known. But experts believe that your age and family history (genetics) may have something to do with your chances of getting the disease. What you eat may add to your chances of getting it. The prostate usually gets larger as you age. Having an enlarged prostate (benign prostatic hyperplasia, or BPH) is very common among older men and doesn't increase your chances of getting prostate cancer. But an enlarged prostate is sometimes caused by prostate cancer instead of BPH.