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What is TRT, and when is it appropriate?

Testosterone replacement therapy (TRT) is a clinician-supervised treatment for hypogonadism — a condition in which the body does not produce adequate testosterone. Testosterone is an FDA-approved medication (as testosterone cypionate, enanthate, gel, and other formulations) indicated for documented testosterone deficiency confirmed by laboratory testing and clinical symptoms.

Symptoms commonly associated with low testosterone in men include persistent fatigue, reduced libido, difficulty maintaining muscle mass or body composition changes, mood changes, reduced cognitive sharpness, and reduced erectile function. These symptoms overlap with many other conditions, which is why lab confirmation — not symptoms alone — is required before a clinician can appropriately prescribe testosterone.

TRT is not appropriate for men with normal testosterone levels who simply want performance enhancement. A legitimate clinician will not prescribe testosterone without documented deficiency. That distinction matters both medically and legally — testosterone is a Schedule III controlled substance in the United States.

Step one: which labs do you need for TRT?

The foundation of any legitimate TRT process is lab work. A diagnosis of hypogonadism requires:

• Total testosterone — two morning draws. The Endocrine Society guidelines recommend confirming low testosterone on at least two separate morning blood draws (testosterone peaks in the morning), with total testosterone below approximately 300 ng/dL as the most commonly used threshold. Single low values can occur due to acute illness or other transient factors.
• Free testosterone. Total testosterone does not tell the full story — free testosterone (the fraction not bound to SHBG or albumin) is the biologically active portion. Some men with normal total testosterone have clinically low free testosterone due to elevated SHBG.
• LH and FSH. Luteinizing hormone and follicle-stimulating hormone help identify whether the issue is primary (testicular) or secondary (pituitary/hypothalamic) hypogonadism. This distinction affects treatment approach.
• Complete blood count (hematocrit). TRT can increase red blood cell production. Elevated hematocrit is a known risk that requires monitoring — baseline values are essential.
• PSA (prostate-specific antigen). Required for men 40 and older or with risk factors. Active prostate cancer is a contraindication to TRT.
• Estradiol. Testosterone converts to estradiol through aromatization. Baseline and ongoing estradiol levels inform whether aromatase inhibitor adjuncts may be warranted.

If you do not have recent labs, a legitimate TRT platform will require you to get them before the clinician makes a prescribing decision. Lab work can be ordered through the platform or completed at a local lab using an order provided during the intake process.

Step two: what does the clinical evaluation cover?

Lab values alone do not determine whether TRT is appropriate. A licensed clinician evaluates both your lab results and your clinical picture:

• Symptom review — the presence, duration, and severity of low-testosterone symptoms
• Health history — current medications, conditions, prior treatments
• Contraindication screening — active prostate cancer, recent cardiovascular events, untreated severe sleep apnea, hematocrit above 54%, active desire for fertility (TRT suppresses sperm production)
• Lifestyle context — sleep quality, diet, exercise, stress — because reversible lifestyle factors can suppress testosterone and should be addressed regardless of whether TRT is prescribed

This evaluation happens as part of the intake process at a legitimate telehealth TRT platform. It is what makes the subsequent prescription medically appropriate rather than a prescription-on-demand arrangement.

Which testosterone formulation will you likely be prescribed?

Testosterone is an FDA-approved medication available in several formulations. The most commonly used through telehealth TRT programs:

• Testosterone cypionate (injectable). The most widely used formulation in telehealth TRT. Weekly or biweekly subcutaneous or intramuscular injections. Stable serum levels, cost-effective, and flexible in dosing. Available through licensed compounding pharmacies.
• Transdermal testosterone (gel/cream). Applied daily to skin (arms, shoulders, or other sites depending on formulation). Provides more stable daily levels than weekly injections but requires diligence about transfer risk to partners or children.
• Subcutaneous pellets. Pellets implanted under the skin every 3–6 months. Less frequent dosing but requires a minor in-office procedure for placement and removal is more complex if adjustments are needed.

Your clinician selects the formulation based on your lifestyle, preference, and clinical picture. For most telehealth programs, injectable testosterone cypionate is the most practical starting point.

What monitoring does a responsible TRT program include?

TRT is not a set-it-and-forget-it prescription. The risks associated with testosterone therapy — elevated hematocrit, estradiol imbalance, lipid changes, PSA changes — require active monitoring. A responsible TRT program includes:

• Follow-up labs at 6–12 weeks after initiating treatment to assess testosterone levels at the target range, hematocrit, and estradiol
• Ongoing labs every 6–12 months once levels are stable
• PSA monitoring for men over 40 or with any prostate risk factors
• Clinician check-ins to review symptoms, adjust dose, and address any concerns

Any TRT platform that does not build follow-up labs and clinician monitoring into the program is not operating within the standard of care. That is a red flag, not a convenience feature.

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