Does the Western diet kill sperm and lower testosterone?

Is sperm heading towards extinction in western nations? Total sperm count in North America, Europe, Australia and New Zealand dropped by up to 60% in the 38 years between 1973 and 2011, research found — an acceleration of a trend that began in the 1940s.

Other studies show a simultaneous decline in testosterone levels — the hormone needed to build a man’s muscle and…