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Systematic review finds very little clinical benefit from Testosterone therapy.  The problem here is one typically made by allopathic medicine.  They look for a benefit in a box.  They look for one therapy to cure all.  Testosterone therapy should be the last thing you prescribe as usually low Testosterone is the effect and early is not the cause.  Clearly, in the right individual, Testosterone therapy can have tremendous positive effects; however, it must accompany nutrition, exercise, inflammation control...  Testosterone is just one piece of a very complex male physiologic puzzle.

Study of 713 Chinese men finds a correlation between low vitamin D and low total Testosterone.

Estrogen increased IL-1beta, IL-6, and MIP-2 in male rat prostate model.

Estradiol induces prostatitis in male rat model.

male mouse model finds estrogen can induce prostatitis and dysplasia of the prostate.

low dose xenoestrogen exposure increases prostate growth and future disease through fetal exposure and increased ER alpha expression.

very interesting study of 7 men.  Increase brain perfusion found and symptom improvement as a result of Testosterone therapy in men ages 58-72.  Specific increase perfusion by SPECT scans were in the midbrain and Brodman areas 8 and 24 of the cerebral cortex.

study of middle aged men (mean age--50) finds no correlation between Testosterone, DHT, and higher Estradiol levels in CVD outcomes, including mortality.  Men who died during the study had lower total Testosterone, free Testosterone, and DHT levels than those that survived during the study.

In men > 65, low Testosterone is associated with CAD.

Men with CHF and low Testosterone have higher readmission rates within 90 days compared to those men with CHF and normal Testosterone.

Female deer mice want nothing to do with Bisphenol A toxic male deer mice

we need to get away from expert opinion statements like this. Not that their conclusions are incorrect; but it promotes laziness among physicians.  We physicians need to take control over the data by which we practice medicine and the only way we can do that is to read it.

Is our effect on the environment and the environments, in turn, effect on us politics or science?  It is science that is manipulated by politicians for political gain/power.  In this study of male small/large mouth bass in NE America are found to have significant female characteristics  i.e. eggs where testes should exist...where none should exist.  The numbers were as high as 85% in the small mouth base compared to 27% for the large mouth bass.  Is there any wonder we have a low T epidemic in men?  The most likely cause are endocrine disruptors.  It is a concern that the authors did not look for endocrine disruptors in the water at the time of this study of the fish.

Long foreskin It was a situation in which he was always so shy when he opened his eyes even though he could easily go out easily, without pain, without tightening. Even when "greeting the flag" he kept hiding the ball under the glans or just poking out. Must have to wait for the hand of "big brother" to slide down to bear the road to see the world around. When you have a clear understanding of the above concepts, the men of the race race to wonder, "Why is the foreskin of my friend not narrowed but why are my and my brother's bad luck?". The doctor asked for the correct answer, partly because of his bad luck, from birth to growing up, the foreskin was like that, "keep loving and protecting the foreskin." But it is not uncommon for other reasons to make men suffer because of foreskin: First, we have to recall the untimely and improper foreskin effects of parents when children are young. It is these overly "anxious" actions of parents that have counterproductive and narrowed down the latter. There are some autoimmune diseases, making the foreskin a fibrous day, loss of elasticity, gradually worsening, called BXO (balanitisxerotica obliterans) - a narrowed glans. This can also be interpreted as a form of glans, which can even cause narrowing of the urinary tract to lead to urinary retention. Some cases of glans and foreskin have been repeatedly infected by microbiological agents (bacteria, viruses, fungi, etc.), which can be re-infected and non-stop treatment is also available. can lead to complications of fibrosis and secondary stenosis

good, well referenced discussion of how Testosterone support for those with low T can improve Diabetes, insulin function, improve energy balance, and reduce cardiovascular disease risk. The discussion discusses many of the moving parts in how testosterone improves CVD risk.

PSA increased more in men with prostate cancer compared to no disease in men on finasteride therapy. This supports the idea that finasteride has a greater PSA reduction in benign prostate disease compared to prostate cancer.

Finasteride more likely to lower PSA associated with benign prostate conditions compared to cancer of prostate.

finasteride lacks the 5 alpha reductase specificity (type 1 > 2) for high grade prostate cancer.