Thanks for following up, PG. I was waiting for someone to get all scientific on me ;) .
My father sees a urologist twice a year and has never been diagnosed with prostate cancer. His PSA has always been low. In addition, his endocrinologist told me he is ready to arrange a full prostate work-up for my dad if we decide to pursue TRT.
There is mounting evidence that low T actually causes prostate cancer, and this is why so many older men have it. One of the consequences of low T is increased estrogen (E2—estradiol). High E2 is positively correlated with increased prostate cancer risk and increased problems with enlarged prostate. High E2 is also correlated with coronary heart disease.
http://www.john leemd.com/store … le_hormone.html
Learn More About Estrogen Levels In Men | BodyLogicMD
Some links regarding T therapy and the prostate:
Testosterone Replacement Therapy Appears Safe For Prostate — ScienceDaily
http://www.cene genicsfoundatio … org/blog/?p=383
http://seniorjo urnal.com/NEWS/ … ncerStudies.htm
[Testosterone replacement therapy and prostate cancer. The current position 67 years after the Huggins myth]
CCC | Copyright licensing, content & software solutions
http://linkingh ub.elsevier.com … 022534705628418
The old-age symptoms are exactly what my father has. Many physicians claim that they are connected to low T. For example,
Vitamins and Supplements Rooted in Science - Life Extension
Women also lose testosterone as they age. Maybe it’s the issue with them, too. Many women are starting to supplement testosterone:
http://www.amaz … /dp/1933213000/
There’s even evidence that the problems with female HRT were that it didn’t supplement testosterone, and therefore upset the natural balance or hormones, leading to a tendency toward certain breast cancers:
Breast cancer incidence in postmenopausal women using testosterone in addition to usual hormone therapy
See also amazon link above.
In addition, the symptoms of "grumpy old men" are the same as those associated with hypogonadism in young people:
Male hypogonadism - Symptoms and causes - Mayo Clinic
Could the problem be hypogonadism rather than simply old age?
As for placebo-controlled, double-blind studies, we have this study showing improvements in lower limb muscle strength, body composition, quality of life, and physical function after 6 months:
Effects of testosterone on muscle strength, physical function, body composition, and quality of life in intermediate-frail and frail elderly men: a randomized, double-blind, placebo-controlled study
This one wasn’t quite so positive, but did show an improvement in lean body mass after 6 months with no negative effects on the prostate:
Effect of testosterone supplementation on functional mobility, cognition, and other parameters in older men: a randomized controlled trial
This 36 month study showed better improvements in health and strength, including reduced cholesterol:
Exogenous testosterone (T) alone or with finasteride increases physical performance, grip strength, and lean body mass in older men with low serum T
This 12-month study showed good results:
Testosterone replacement in older hypogonadal men: a 12-month randomized controlled trial
But 3 months doesn’t appear to be enough for big changes:
A double-blind, placebo-controlled, randomized clinical trial of transdermal dihydrotestosterone gel on muscular strength, mobility, and quality of life in older men with partial androgen deficiency
On the other hand, 12 weeks produced good results when combining T with exercise, even though neither alone did any good:
Effects of modest testosterone supplementation and exercise for 12 weeks on body composition and quality of life in elderly men
Dad hates working with his personal trainer, although he likes him as a person. He finds exercise painful and dull. He may be improving a little, though. He does a lot of lower body work and core work. I’ll be meeting the trainer the next time I visit the folks, probably over February vacation.
In addition to the above, here’s a good article from the NYTimes: Vigor Quest - The New York Times
There’s also this PowerPoint presentation from a leading guy in the TRT area: All Things Male - Center for Men’s Health
By the way, my father fell again this weekend. That’s about 10 times in the past year. Fortunately, nothing broke.
Originally Posted by Para-Goomba
As you said, there is plenty of evidence that testosterone "feeds" existing prostate cancer. And most sources seem to agree that about 80% of men have prostate cancer by age 80, so I’m not sure why that risk does not concern you.The old-age symptoms you listed above are (mostly) also found in older women, so I don’t see strong reason to suppose that they are due simply to declining testosterone.
Has anyone undertaken good double-blind, placebo-controlled studies on testosterone replacement in older men? As you may remember, there were tons of correlational studies showing better health outcomes among post-menopausal women who were on hormone replacement therapy, and high-profile experts became HRT advocates. But then when real experiments began to be done, they actually had to be stopped early because the evidence was so strong that the hormones were hurting the women in all sorts of the ways; apparently the correlational results were due to self-selection of participants. I’m open-minded that TRT may turn out to be wonderfully beneficial (at least for men young enough that they haven’t yet developed prostate cancer), but I wonder whether the evidence is really in yet.
You said your father recently began to work with a personal trainer. How long has this been going on? What exercise is he doing? In older people especially, the adage of "use it or lose it" is extremely true, and I wonder whether most of his weakness has been due to his exercise aversion. Medications, too, as others have said, can take a toll. My grandfather has had to switch medications a few times to avoid unacceptable levels of fatigue and vertigo.