Study Headline Misleading

The headline states "Testosterone Tumbling in US Males"

But, as usual, the useful information is buried in the article. Here's the lede:

The testosterone-fueled American male may be losing his punch.

Over the past two decades, levels of the sex hormone in U.S. men have been falling steadily, a new study finds.

Here's the reality-check:

He and his colleagues analyzed blood samples -- along with health and other information -- from about 1,500 men in the greater Boston area who took part in the Massachusetts Male Aging Study

That's a Blue-State bastion. Draw your own conclusions.