Should A 85 Year Old Man Be Concerned About Low Testosterone?

Yes, your doctor is right because in older age with low testoserone there is a chance of death early than with the higher testoserone , below is the link which could help you:

www.clinchem.org

Yes your doctor is right. Tetosterone level decreases with age and there are proper medications which you must take in order to reduce the effects of low testosteone. For complete details click on the link.
low level of testosterone

testosterone is need for heart health, bone and muscle strength, etc, just as estrogen is for women.  take the meds- you find you feel a lot better after!   :}

Every year, starting from the beginning of puberty, a man's testosterone level decreases by 1%. Low testosterone levels could mean low blood pressure and could lead to erectile dysfunction. It could also lead to prostate problems. You should try a medication to help boost your testosterone level. Ask your doctor to see what's right for you.