A new study by Dr. Robert Block at the University of
Iowa disputes the commonly held notion that marijuana alters
the level of testosterone and other sex hormones.
The study contradicted a widely publicized 1974 study
by Dr. R.C. Kolodony, which reported decreased testosterone
levels in men who smoked marijuana chronically.
The U. of Iowa study found that chronic marijuana use
had no effect on testosterone, luteinizing hormone, follicle
stimulating hormone, prolactin and cortisol in men or women.
Noting that six other studies had failed to show
lowered testosterone levels in men, Dr. Block concluded: "It
appears that marijuana, even heavy use of the kind that's
typical in the United States, doesn't alter testosterone levels."
Does anybody have any other sources for this? A lot of 'ma or pa-science' (generation absent from internet and readily accessible information) states that smoking dope will alter or decrease testosterone levels (hinder gains).