| >Reference ranges are always adapted to specific populations. in this case, reference ranges are adapted so people don't qualify for therapy. The side effects of the low levels don't change just because you change the reference range >Testosterone levels have not necessarily been falling since industrial times - records farther back than 50-70 years are extremely error prone and sporadic since methods of testing have changed dramatically. My exhaustive reasearch has shown the opposite.
Interestinglingly, even older guys now have higher testosterone levels than younger guys. So you can even see it in the living specimen. >Doctors are not saying that a 40 year old having the same testosterone level as an 18 year are "unhealthy" en masse. It is simply normal for the hormone to decrease as one ages. There is no "strange and contrived reason". It's just how the human body works and isn't a problem unless it goes too low and causes dysfunction of some kind. 1. doctors say that, en masse. 2. There is some evidence that the lower testosterone levels are caused by injuries and dysfunctions. At least some studies point to that.
An analogy: Age doesn't cause bad teeth. Caries and injuries cause bad teeth. If these don't happen, teeth stay healthy. Saying it's normal that your teeth fall out is lazy. >The reason for lower testosterone is probably very boring and not some insidious thing like you're implying: people are more obese because they eat more calories, and this is strongly linked to lower testosterone levels. You are partially right. Testosterone is regulated through estrogene. Having high estrogene limits your testosterone production. Obesity and less sport is sufficient. But a lot of non-obese and healthy people who work out also have low testosterone levels |