Det beror inte på vår livsstil eller hälsa. Det är något annat utifrån som påverkar oss.
"These findings indicate that the past 20 yr have seen substantial age-independent decreases in male serum T concentrations, decreases that do not appear to be the consequence of the contemporaneous trends in health and lifestyle considered here. It remains unclear to what these apparent population-level decreases in T are attributable" -
https://academic.oup.com/jcem/article/92/1/196/2598434