Another point I’d like to make for people worried about a link between high testosterone and prostate cancer is that it just doesn’t make sense. Prostate cancer becomes more prevalent in men as they age, and that’s also when their testosterone levels decline. We almost never see it in men in their peak testosterone years, in their 20s for instance. We know from autopsy studies that 8% of men in their 20s already have tiny prostate cancers, so if testosterone really made prostate cancer grow so rapidly — we used to talk about it like it was pouring gasoline on a fire — we should see some appreciable rate of prostate cancer in men in their 20s. We don’t. So, I’m no longer worried that giving testosterone to men will make their hidden cancer grow, because I’m convinced that it doesn’t happen.
Other undesirable androgenic consequences include aggressiveness, increase or decrease in libido, more pronounced hair growth on the face and body, changes in skin hue, oily skin and acne. The propionate ester may also worsen the condition of individuals already predisposed to male pattern baldness. A counteracting treatment regimen may be needed, but there are no guarantees to minimise hair loss. Testosterone products inhibit the body’s natural production of testosterone. To combat the crash, a drug to stimulate testosterone may be prescribed.