[sreaching]

testosterone levels have declined in most developed countries when comparing similar age cohorts over time. See the following studies: from Finland - https://www.ncbi.nlm.nih.gov/pubmed/23161753. from USA - https://academic.oup.com/jcem/article/92/1/196/2598434

it is a bit of a medical mystery because the trend cannot be fully explained by lifestyle factors like weight gain.

[52-6F-62]

This discussion came up sometime within the past few months. It was really interesting.

I recall mentioning some research into the effects of food/organics preservatives (namely Parabens) and low testosterone: https://www.ncbi.nlm.nih.gov/pubmed/12419695