What Is TRT?
Testosterone Replacement Therapy (TRT) is a medical treatment that restores testosterone levels in men whose bodies don't produce enough on their own. It's prescribed for a condition called hypogonadism — clinically low testosterone confirmed by blood tests and accompanied by symptoms.
TRT involves introducing testosterone into your body from an external source — most commonly through injections, but also via creams, gels, pellets, or oral medications. The goal is to bring your testosterone levels into the normal physiological range, relieving the symptoms caused by deficiency.
Who Needs TRT?
TRT is appropriate for men with confirmed hypogonadism: a total testosterone level below 300 ng/dL on two separate early-morning blood draws, accompanied by symptoms like persistent fatigue, low libido, loss of muscle mass, increased body fat, mood changes, or cognitive difficulties.
It is not appropriate for men with normal testosterone who want a performance enhancement, men with active prostate or breast cancer, men with untreated severe sleep apnea, or men actively trying to conceive without concurrent fertility-preserving medications. See our symptoms guide and testing options.
How TRT Works
Testosterone cypionate — the most common form — is injected into muscle or fatty tissue, typically every 3.5 days. The testosterone enters your bloodstream and binds to androgen receptors throughout your body, restoring the hormonal signals that drive energy production, muscle protein synthesis, fat metabolism, sexual function, mood regulation, and cognitive clarity.
Your provider monitors your response through regular bloodwork and adjusts your dose based on the results. Most men find their optimal protocol within 2–3 adjustment cycles. For details: dosage guide, injection guide, bloodwork guide.
The Benefits
When properly managed, TRT can improve energy and reduce fatigue, restore libido and sexual function, support muscle gain and fat loss, improve mood, motivation, and mental clarity, and support bone density and cardiovascular health markers. Benefits emerge gradually over 1–6 months. See our realistic timeline for what to expect at each stage.
The Risks
TRT carries manageable but real risks: erythrocytosis (blood thickening) in 11–20% of men on injectables, estrogenic side effects in 10–25%, fertility suppression (near-universal without intervention), and acne during the adjustment period. The TRAVERSE trial confirmed TRT does not increase heart attack or stroke risk. All risks are manageable with proper monitoring. Full details: side effects guide, TRAVERSE trial explained.
What It Costs
Expect $100–$300/month through online clinics, depending on the provider and protocol. Budget clinics start at ~$99/month all-inclusive. Mid-range memberships run $149–$199/month. Premium optimization services cost $200–$500+/month. Annual totals range from $1,400 to $4,500+. Full breakdown: TRT cost guide.
How to Get Started
The process: choose a provider, complete health intake, get baseline bloodwork, consult with a physician via telehealth, receive your prescription by mail, and begin treatment with ongoing monitoring. Most men go from signup to first injection in 1–3 weeks. Step-by-step details: how to get TRT online. Provider comparison: best TRT clinics.
Alternatives to TRT
Not ready for TRT? Options include natural optimization (sleep, exercise, nutrition, body composition), evidence-based supplements (ashwagandha, tongkat ali), and non-suppressive medications like enclomiphene that boost your body's own production. These work best for mild deficiency. For confirmed, symptomatic hypogonadism below 300 ng/dL, medical treatment typically provides the most reliable relief.