Reddit mentions of Bodybuilding, Drugs and Risk (Health, Risk and Society)

I'm a biologist and took a lot of classes in human related biology. Unfortunately I don't have any specific papers to cite you, but I can cite you a book: "Endocrinology" by Mac E. Hadley and John Levine. Published by Prentice Hall, ISBN is 0-13-187606-6.

Testosterone is produced by your adrenals (about 5-10%) and then primarily your testes (The rest). It is made from cholesterol, and is responsible for the secondary male sex characteristics. These are things like increased muscle mass, male hair patterns, libido (men AND women), deepening of the voice during puberty, the male body shape (narrow hips/pelvis).

Testosterone production is stimulated by your anterior pituitary, which releases a hormone called leutinizing hormone. Sperm production, on the other hand, is stimulated by a hormone from the same gland called follicle stimulating hormone. BOTH of these hormones are released from the anterior pituitary when the hypothalamus releases a hormone called gonadotropin releasing hormone, or GnRH.

If you are interested in what happens when you use testosterone or testosterone derivatives to build muscle, then I refer you to this book: http://www.amazon.com/Bodybuilding-Drugs-Risk-Health-Society/dp/041522683X