traditionally it was felt that testosterone (t) replacement in men who had low t (called "hypogonadism") would increase the risk for prostate cancer. more recently it has been suggested that it may be better for a man to have a normal t to maintain an average or lower risk for prostate cancer in the future. dr abe morgantaller a noted urology expert in this area and a friend of mine who works in boston has written a lot about this. in your case even though you seem to have a strong family history of prostate cancer it may be very reasonable to give you supplemental t to get your levels to normal. you should see a urologist or an endocrinologist for your specific case. in addition to a normal psa (which you currently have) the doctor should do a digital rectal exam (dre) before starting you on t replacement to make sure this "prostate screening" is also normal. the current most popular way to replace t is with topical gels (androgel or testim) that are rubbed on the skin of the shoulders or upper back or chest daily.
would i benefit from achieving a normal testosterone level in terms of cancer prevention? . i have a family history of prostate cancer. my psa is low however my testosterone levels are also low.