While it might not seem like it at a glance several studies have shown that testosterone levels in men these days are not as they once were. They are significantly lower than they were in the decades leading up to now.
Don’t get me wrong, most men do have healthy levels but they are still reduced. One study from 2006 actually outlined this decline perfectly. It was titled “A Population-Level Decline in Serum Testosterone Levels in American Men” and reveals some shocking numbers. The goal of this study was to establish the magnitude of population-level changes in serum T (testosterone) concentrations. This also takes into consideration several other factors.
This study had about over 1500 participants and several observations were taken on each. While that might not seem like a big number, it is big enough for them to have a good idea of what we are facing. With three data collection waves, they were able to obtain a lot of information on these men.
Results – We observe a substantial age-independent decline in T that does not appear to be attributable to observed changes in explanatory factors, including health and lifestyle characteristics such as smoking and obesity. The estimated population-level declines are greater in magnitude than the cross-sectional declines in T typically associated with age.
Conclusion – These results indicate that recent years have seen a substantial, and as yet unrecognized, age-independent population-level decrease in T in American men, potentially attributable to birth cohort differences or to health or environmental effects not captured in observed data.
This was not the only study carried out on the topic, a Danish study was done in the same manner as well. This coming from the same year and was able to conclude in theirs that there was, in fact, an age-independent change in SHBG and testosterone. They suggested that it could be explained by an initial change in SHBG levels which caused the adjustment in testosterone levels. However, more research will, of course, need to be done on the topic
It really does seem that this decline is quite present but, what does it mean and why is it happening? Testosterone levels have continued to drop throughout the years and no clear outcome has been found just yet. While there are several likely reasons behind it nothing is set in stone just yet. To learn more about this please check out the video below
Image via Jacked