Actually, a propos smoking and testosterone: it has been shown that smoking increases testosterone production.
Here’s an exerpt:
"In the entire cohort, smokers had higher total (21.9 ± 7.2 vs. 19.8 ± 6.9 nmol/liter; P < 0.001) and free (427 ± 113 vs. 391 ± 113 pmol/liter; P < 0.001) testosterone levels at baseline than nonsmokers. Smoking at baseline seemed to be inversely associated with a lower risk of hypogonadism as defined by total (at least 20 cigarettes/d vs. nonsmoker, OR, 0.44; 95% CI, 0.16–1.22; trend across smoking categories, P = 0.11) and free testosterone levels (at least 20 cigarettes/d vs. nonsmoker, OR, 0.64; 95% CI, 0.29–1.44), but the association was attenuated even further by adjustment for respective baseline testosterone levels. A decrease in smoking during follow-up was even more clearly associated with the risk for hypogonadism as defined by total (for a 10-cigarette decrease per day, OR, 1.68; 95% CI, 0.97–2.92) and especially free testosterone levels (for a 10-cigarette decrease, OR, 1.80; 95% CI, 1.16–2.79), with only minor attenuation when adjusting further for baseline testosterone levels. Although the increase in risk with decreased cigarette smoking during the follow-up was independent of changes in waist circumference and other characteristics of the metabolic syndrome, it is noteworthy that men who quit smoking during the follow-up had a larger increase in waist girth than men who remained smokers (9.6 ± 0.6 cm vs. 7.3 ± 0.5 cm; P = 0.007). In analyses with total testosterone and free testosterone as continuous outcome variables, the change in the daily number of cigarettes smoked was also consistently positively and independently associated with changes in total and free testosterone levels during follow-up " (Laaksonen et al, 2005)
And here’s the link to the study: http://jcem.end ojournals.org/c … l/jcem;90/2/712
See here: