Testosterone Replacement Therapy

Testosterone replacement therapy (TRT), otherwise known as testosterone replacement treatment or hormone replacement therapy for men, restores testosterone levels to the optimal range of young adults. The goal of hormone therapy for men is to alleviate symptoms of low testosterone and regain the positive effects of restored testosterone levels.

In most cases, testosterone deficiency can be easily treated with TRT under the supervision of a medical professional. However, if the root cause of low T is congenital or genetic, specialized treatment may be necessary.

Testosterone levels typically decline with age, but not all men experience it. Other factors can cause low testosterone symptoms, so consulting a healthcare professional to identify the underlying cause is important.

If you’re experiencing common symptoms of low T, like lack of sex drive, fatigue, decreased muscle mass or strength, increased body fat, and mood changes, you may have low T. However, other factors can also cause these symptoms. Thus, speaking with a healthcare professional is important to determine if low T is the cause.

The main downside of TRT is its side-effect profile: acne, hair loss (alopecia), reduced fertility, and an elevated red blood cell count (erythrocytosis) that requires monitoring. TRT lowers fertility because replacement testosterone suppresses the body’s own signal to produce sperm (the HPG axis), so sperm count typically drops while on treatment. This drop is not permanent for most men. Research on hormone-based male contraception, which suppresses sperm production the same way, found sperm counts returned to normal ranges in 90% of men within 12 months of stopping and in nearly all men within 2 years, though the exact timeline depends on age and how long someone was on treatment. Endocrine Society guidance calls for baseline hematocrit, PSA, and a lipid panel before starting TRT at any age, then hematocrit and PSA rechecked at 3 to 6 months and lipids monitored on an ongoing basis, since testosterone therapy can raise LDL cholesterol and lower HDL. Our physicians still consider TRT a safe and beneficial option for most men when these effects are tracked with routine labs.

The cost of testosterone replacement therapy (TRT) can vary depending on the treatment type, dosage, administration frequency, and the healthcare provider. Opt Health offers TRT to clients who qualify as part of our Optimization and Longevity plans, starting at $245 per month plus a $195 initial lab fee. For a breakdown of what TRT costs across delivery methods and care models, see how much does TRT cost. For whether insurance covers TRT, see does insurance cover TRT.

While testosterone replacement therapy (TRT) is primarily used to treat medical conditions such as low testosterone levels, TRT has some non-medical uses. For example, because of its ability to improve cognitive function, energy levels, and sexual function, TRT has also been marketed as an anti-aging treatment.

TRT is used medically to treat men with low testosterone levels. TRT can be administered through injections, patches, gels, or pills, depending on individual needs. For what to avoid while on TRT, see testosterone therapy.

Yes, talking to a doctor is exactly how a testosterone replacement therapy evaluation starts. A physician evaluates your medical history and comprehensive lab tests to confirm clinical suitability before prescribing an individualized treatment plan.

Testicular size can decrease on TRT because replacement testosterone suppresses the pituitary signals (LH and FSH) that normally drive the testes to produce testosterone and sperm on their own. With less of that stimulation, the testes can shrink somewhat, and Endocrine Society guidance treats the degree as dose-related and specific to the individual rather than a fixed size or percentage. Ask your prescribing physician what to expect, since the change varies by person.

Age alone does not rule out testosterone therapy for a 70 year old man with confirmed low testosterone and symptoms. Endocrine Society guidance calls for an individualized risk assessment at that age, including closer monitoring of PSA and hematocrit than for a younger patient. The decision depends on overall health, prostate history including a family history of prostate cancer, and cardiovascular risk, evaluated through bloodwork and a physician consultation rather than a fixed age cutoff. For who should not start TRT, see testosterone therapy. The same individualized reasoning with no fixed age cutoff applies to a 50 year old man: the decision still rests on confirmed lab-tested low testosterone, your symptoms, and a physician consultation rather than age in either direction.

Current clinical evidence does not show that testosterone replacement therapy causes prostate cancer in men without pre-existing prostate cancer. Physician-supervised TRT already includes the regular PSA monitoring that catches a meaningful change early, whatever the cause. Your prostate history is one of the factors reviewed before starting treatment, and PSA gets rechecked as part of ongoing care.

TRT does not appear to raise the risk of heart attack, stroke, or cardiovascular death, according to the TRAVERSE trial published in the New England Journal of Medicine. The trial followed men with hypogonadism and cardiovascular risk factors and found no increase in that combined outcome compared with placebo. It did find more atrial fibrillation and blood clots in the testosterone group, which is part of why TRT includes ongoing cardiovascular monitoring.

Yes. Testosterone is a Schedule III controlled substance under the U.S. Controlled Substances Act, the same schedule as ketamine. Prescribing a Schedule III drug requires a DEA registration and more paperwork than a non-controlled prescription. Endocrine Society guidelines also call for two separate morning blood tests confirming a low level before starting treatment. That extra diagnostic step is a procedural reason TRT usually takes more than one office visit to start, and it says nothing about whether the treatment works. Pharmacologically, testosterone is also classified as an anabolic steroid, the same category used in performance-enhancing steroid misuse. Two things matter for telling TRT and steroid misuse apart: the dose and the oversight. TRT targets a normal physiological testosterone level in a man whose labs show a deficiency, prescribed and monitored by a physician. Non-medical steroid use means taking testosterone or related compounds well above what the body produces on its own, without a diagnosis or lab monitoring.

The extra caution around prescribing testosterone replacement therapy has administrative and historical causes, not a question of safety or effectiveness under medical supervision. That caution often traces to the extensive DEA Schedule III documentation burden, lingering conflation with anabolic steroid abuse (which medical dosing and continuous physician oversight clearly separate), and older cardiovascular concerns that the TRAVERSE trial addressed. Physician-supervised TRT gives you the thorough diagnostic testing, precision dosing, and regular lab monitoring that these medical safeguards were designed to support.

Early effects show up first: many men notice better mood, energy, and libido within 3 to 6 weeks of starting treatment. Body composition changes, more lean mass and less fat, typically become measurable around 2 to 3 months and continue for a year or longer. Bone density and cardiometabolic changes take longer, showing up over 6 to 12 months or more, per the Endocrine Society's clinical practice guideline. Individual results vary with age, baseline testosterone level, and the treatment plan a physician sets. Stopping TRT is possible, but it works best with a physician's guidance rather than doing it alone. Replacement testosterone suppresses the body's own production while you are on it, so stopping causes a temporary drop before natural production resumes. A study following men after they stopped testosterone injections found hormone recovery is gradual and can take well over a year to complete, with the timeline depending on age and how long treatment lasted.