Testosterone replacement therapy (TRT) is a medical treatment that restores testosterone to healthy levels in men diagnosed with low testosterone (hypogonadism). HeydayMD provides TRT online starting at $99 per month — including at-home blood testing of an 8-marker male hormone panel, virtual consultations with licensed providers, and monthly delivery of testosterone cypionate.
What Is TRT?
Testosterone Replacement Therapy is exactly what it sounds like — replacing the testosterone your body isn't producing enough of. It's a prescribed medical treatment, not a supplement or booster. TRT brings your levels back into the normal range for adult men (reference ranges vary by lab, and targets are individual), which is fundamentally different from supraphysiological dosing used in performance enhancement.
The goal isn't to give you "extra" testosterone. It's to restore what your body should be producing on its own, allowing your systems to function as they're designed to.
How Does TRT Work?
When you have clinically low testosterone, your body's systems that depend on this hormone — energy metabolism, muscle protein synthesis, fat regulation, mood, cognitive function, sexual health — are all operating at a deficit. TRT provides exogenous testosterone to bring levels back to normal, allowing these systems to function properly again.
After starting treatment, most men notice improvements in a predictable timeline: energy and mood improvements within 2-4 weeks, sexual function improvements within 3-6 weeks, body composition changes over 3-6 months, and full benefits by 9-12 months of consistent treatment.
Treatment Methods Compared
Testosterone can be delivered through several methods, each with distinct advantages. Intramuscular testosterone injections (cypionate or enanthate) are the most common, given weekly or bi-weekly, offering precise dosing and reliable absorption. Topical gels provide daily steady-state levels but carry transfer risk to others. Transdermal patches offer consistent delivery but may cause skin irritation. Subcutaneous pellets are implanted every 3-6 months for hands-off treatment. Oral formulations (like testosterone undecanoate) are newer options that avoid first-pass liver metabolism.
Important: TRT Is Ongoing Treatment
TRT is not a short-term fix. Because exogenous testosterone suppresses your body's natural production, stopping treatment means your levels will drop — often below where they started. This is a long-term medical commitment that requires ongoing monitoring.
Who Is a Candidate for TRT?
TRT is appropriate for men with documented low testosterone (below 300 ng/dL on two separate morning tests) AND bothersome symptoms that haven't responded to lifestyle interventions. It is NOT appropriate for men trying to conceive (TRT suppresses sperm production), men with untreated prostate cancer, men with severe untreated sleep apnea, or men with significantly elevated red blood cell counts.
Monitoring & Safety
Responsible TRT requires regular lab monitoring — typically every 3-6 months. Your provider should track total and free testosterone, hematocrit and hemoglobin (to watch for polycythemia), PSA (prostate health marker), estradiol (testosterone converts to estrogen), and lipid panel and metabolic markers.
Getting Started: What the Process Actually Looks Like
Before any prescribing decision is made, a licensed clinician needs a clear picture of your health, not just a single number. That typically starts with bloodwork, usually drawn in the morning when testosterone is highest, along with a review of your symptoms and medical history. From there, a licensed MD, NP or PA evaluates whether treatment is clinically appropriate for you — and if it is, what monitoring schedule makes sense given your labs. If you're trying to figure out how this stacks up against going to a local urologist or endocrinologist, it helps to think through questions to ask any TRT provider before you commit to a plan of care.
Common Mistakes Men Make When Considering TRT
A lot of men run into trouble not because TRT itself is risky when properly managed, but because of how they approach it. Some skip baseline labs altogether and start treatment based on symptoms alone, which makes it hard to tell later whether changes are really due to testosterone or something else. Others assume one low reading is definitive, when testosterone naturally fluctuates with sleep, stress, illness, and time of day — which is why repeat testing matters. Another frequent mistake is ignoring markers besides testosterone itself, like hematocrit or estradiol, both of which can shift once treatment begins and affect how you feel.
- Testing only once instead of confirming low levels on a second morning draw
- Overlooking lifestyle factors — sleep, alcohol, body weight — that can suppress testosterone independent of age
- Stopping and restarting treatment without clinician guidance, which can affect natural production
If your levels are borderline or your symptoms don't clearly line up with a low reading, it's worth reading about what it means to have normal testosterone but ongoing symptoms before assuming TRT is the answer.
Conditions That Often Overlap With Low Testosterone
Low testosterone rarely exists in isolation. Sleep disorders, metabolic issues, and hormone imbalances can all produce overlapping symptoms — fatigue, low libido, mood changes — which is part of why a thorough evaluation matters more than a single lab value. For example, untreated sleep apnea can both lower testosterone and mimic its symptoms, so addressing one without the other may leave you with incomplete results. Men researching the relationship between sleep apnea and low testosterone often find that treating both conditions together, under appropriate clinical guidance, produces a clearer picture than focusing on hormones alone.
Frequently asked questions
Can I just order testosterone online without lab testing?
No responsible provider should prescribe testosterone without first reviewing bloodwork and history. A licensed clinician needs to confirm low testosterone is actually present and that no contraindications exist before deciding whether treatment is appropriate.
Will my testosterone levels go back to normal if I stop treatment?
Not necessarily right away. Because exogenous testosterone can suppress your body's own production, levels may take time to recover after stopping, and in some cases recovery varies from person to person. This is something to discuss directly with your clinician before starting or stopping treatment.
How often will I need bloodwork once treatment starts?
Monitoring frequency depends on your individual labs and how your body responds, but regular follow-up testing is a standard part of responsible treatment. Your clinician will set a schedule based on your specific results rather than a one-size-fits-all timeline.
Is TRT the same as taking a testosterone booster supplement?
No. Over-the-counter boosters are not regulated the same way as prescription testosterone and generally have limited evidence behind them. TRT is a prescription treatment that requires clinical evaluation, monitoring, and a documented diagnosis of low testosterone.
