>>21526277 Below is a list of scientific studies that have investigated the relationship between smoking and testosterone levels in men, some of which have found that smoking may be associated with increased testosterone levels:
Svartberg, J., Jorde, R. (2007). "Endogenous Testosterone Levels and Smoking in Men. The Tromsø Study." International Journal of Andrology, 30(1), 137–143.
English, K.M., Pugh, P.J., Parry, H., Scutt, N.E., Channer, K.S., Jones, T.H. (2001). "Effect of Cigarette Smoking on Levels of Bioavailable Testosterone in Healthy Men." Clinical Science, 100(6), 661–665.
Trummer, H., Habermann, H., Haas, J., Pummer, K. (2002). "The Impact of Cigarette Smoking on Human Semen Parameters and Hormones." Human Reproduction, 17(6), 1554–1559.
Hammoud, A.O., Gibson, M., Hunt, S.C., Adams, T.D., Carrell, D.T., Kolotkin, R.L., Meikle, A.W. (2010). "Effect of Roux-en-Y Gastric Bypass Surgery on the Sex Steroids and Quality of Life in Obese Men." The Journal of Clinical Endocrinology & Metabolism, 95(9), 4239–4245.
Gan, W.Q., Man, S.F.P., Sin, D.D. (2006). "The Interactions between Cigarette Smoking and Reduced Lung Function on Systemic Markers of Inflammation." Thorax, 61(8), 659–664.
