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Several theories have been hypothesized regarding the mechanisms by which smoking lowers testosterone levels owing to Leydig cell dysfunction by various mechanisms such as chronic hypoxia, smoke-induced oxidative stress (ROS), neuroendocrinal effect of nicotine on hypothalamo-pituitary-gonadal axis, direct cytotoxic effect on Leydig cells either causing downregulation of key enzymes of steroidogenesis (NR5A1, CYP11A1, and 3b-HSD1) or by inducing apoptosis (by increase in Bax (proapoptotic protein) and caspase-3 expression, and a decrease in Bcl-2 (an antiapoptotic protein) expression[]
Craven A's were a favourite cigarette during World War II
Graphics must occupy at least 50% of the front and back of cigarette packs and 20% of space on each cigarette advertisement, according to Slate
Research Findings When it comes to understanding the effects of smoking on testosterone levels, the research findings are conflicting
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