TRT at Different Ages: 20s to 70+

TRT in your 20s is a major decision with lifetime implications. Before age 30, truly low testosterone should trigger a thorough investigation, not an automatic prescription. Causes to rule out: pituitary tumors (prolactinoma, other adenomas), Klinefelter syndrome (genetic), varicocele (often correctable surgically), medications (opioids, SSRIs, finasteride), lifestyle factors (obesity, extreme dieting, overtraining, poor sleep), and anabolic steroid-induced hypogonadism (past use). Fertility is usually a top priority — TRT without hCG at this age is a significant fertility risk. The risk/reward calculus is different than at 50: you're committing to decades of injections, monitoring, and expense. If lifestyle factors can be corrected, try that first.

The 30s are the most common decade for men to start TRT. T levels naturally begin a gradual decline (~1% per year after 30), but symptomatic hypogonadism at this age is not 'normal aging' — it's pathological and worth treating. Fertility is still relevant for many men in their 30s — include hCG or have a fertility plan. Common scenario: busy career, young kids, poor sleep, stress, less exercise leading to low T symptoms. The challenge is distinguishing lifestyle-induced low T from true hypogonadism. If lifestyle improvements raise T to normal, you may not need TRT. If T stays low despite optimization, TRT may be warranted.

The 40s and 50s are the 'sweet spot' for TRT — you're old enough that age-related decline is real, young enough to benefit significantly, and fertility is less likely to be a priority. PSA monitoring becomes important (prostate cancer risk increases with age — not caused by TRT, but existing cancer could be fueled). Cardiovascular screening matters more: stress test, coronary calcium score, lipid management. Many men in this age bracket report the most dramatic quality-of-life improvements from TRT: energy returns to 30s levels, libido restores, body composition improves noticeably with proper diet and exercise. This is the demographic where the benefit/risk ratio is most favorable.

TRT in older men requires more caution. Considerations: prostate cancer risk — must have normal PSA and DRE before starting, and regular monitoring. Polycythemia risk increases — older men are more sensitive to TRT's erythropoietic effects. Polypharmacy — more medications means more potential interactions. Cardiovascular disease prevalence is higher — ensure cardiac clearance if there's known disease. However, TRT at this age can provide significant benefits: improved muscle mass and strength (sarcopenia prevention), better bone density (osteoporosis prevention), improved cognition and mood, and better quality of life. Many men in their 60s and 70s continue TRT successfully with appropriate monitoring. The dose may need to be lower than at 40.