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 shape and size of the prostate gland is like a walnut. For unknown reason, the cells begin to grow uncontrollably and may develop to other parts of the body. The exact reason why prostate cancer develops from the prostate gland as well as other parts of the body is not known.