Why is testosterone so popular?
It turns out that testosterone, like other steroid hormones, perform a complex set of functions related to health; ranging from cardiovascular and metabolic regulation, to cerebrovascular and neurotransmitter modulation. Despite the marketing (more testosterone equals better sex drive and a better physique), sex hormones are not just about sex or big muscles.
It turns out that low testosterone is associated with an increased risk of cardiovascular disease, increased insulin resistance and depressed mood. In vets, low testosterone is associated with an increased risk of PTSD, metabolic syndrome and mortality from any cause. While researchers and functional medical specialists have understood the importance of steroid hormones for years (all the way back to Hans Selye), this knowledge has been slow to transfer into mainstream clinical health; that is, until it could be commercialized into libido enhancer.
When testosterone concentrations wane as men age, the risk for many of the diseases of aging increase (cardiovascular disease, stroke, etc). Much like the hormone replacement therapy (HRT) prescribed for female menopause, pharmaceutical companies are hoping that testosterone replacement eases the symptoms of andropause (low libido, depression, weight gain) and reduces the risk for cardiovascular and other disease processes. Though it is too early to tell if testosterone replacement will follow the same over-marketing that HRT did. (HRT was first marketed to enhance libido and general health, then gradually became the panacea for all diseases of aging. The over-reach was not supported by science and subsequently was followed by billions in lawsuits. A gradual retraction of uses and re-positioning as simply a medication to be taken as briefly as possible to help with hot flashes is now marketed). What is clear, is that the role of hormones in health is becoming more mainstream. For that, we thank the gods of waning male virility.