How much testosterone does a guy produce?

Varies. One study estimates that healthy men produce 3.7 +/- 2.2 mg/d: http://jcem. Endojournals. Org/content/82/5/1492.Long. In this same study, women were found to produce 0.4 +/- 0.1mg/d. This is roughly consistent with the approximately 20:1 ratio of upper limit of normal testosterone in men vs women as noted by labcorp #070001.