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 bladder cancer is unknown. It occurs when abnormal cells grow and multiply quickly and uncontrollably, and invade other tissues. Smoking increases your risk of bladder cancer. Smoking causes half of all bladder cancers in men and women. The following factors also increase your risk of developing bladder cancer: exposure to cancer-causing chemicals at work.