What testosterone level is low enough to need treatment?

Short answer

• Most guidelines treat a total testosterone <300 ng/dL (≈10.4 nmol/L) in an adult man with compatible symptoms as low enough to consider testosterone replacement therapy (TRT).
• Levels <200 ng/dL are generally considered clearly low and more likely to benefit from treatment.
• Borderline values (≈200–300 ng/dL) require careful reassessment (repeat morning measurement, check free testosterone and SHBG, and assess symptoms) before starting therapy.

Key points to understand

• Measure correctly: get blood drawn in the morning (usually 7–10 AM), fasting if possible, and repeat the test on a different day to confirm a low result. Use total testosterone first; if total is borderline or SHBG likely abnormal, calculate or measure free testosterone.
• Symptoms matter: treatment is usually recommended only when low lab values are accompanied by consistent symptoms (low libido, erectile dysfunction, fatigue, decreased muscle mass/strength, depressed mood, anemia, reduced bone density).
• Distinguish cause: measure LH/FSH to tell primary (testicular) vs secondary (pituitary/hypothalamic) hypogonadism; check prolactin, iron studies if indicated, and consider pituitary imaging for secondary causes.
• Risks/contraindications: TRT can raise hematocrit, worsen sleep apnea, affect cardiovascular risks, suppress sperm production and fertility, and is contraindicated in active prostate or breast cancer. Baseline PSA and hematocrit are needed and should be monitored during treatment.

What to do next

1. If you suspect low T, get two morning total testosterone measurements.
2. If results <300 ng/dL with symptoms, see a clinician (primary care, endocrinologist or urologist) for full evaluation, discussion of risks/benefits, and monitoring plan.
3. If fertility is a priority, discuss alternatives (clomiphene citrate or hCG) rather than standard TRT, because TRT often suppresses spermatogenesis.

Monitoring if treatment is started

• Baseline and periodic hematocrit, PSA, liver function, lipid profile, and symptom assessment. Typical follow-up: 3 months after starting, then 6–12 months.

Services and products (examples)

• Labs: Labcorp or Quest Diagnostics for clinical testing; at-home/tele-lab options like LetsGetChecked or Everlywell can provide accessible morning testing (confirmatory clinical testing is still recommended).
• Telemedicine/men’s health services: PlushCare, Hims, or Roman can facilitate evaluation and follow-up for sexual health and TRT under a physician’s supervision.
• Common TRT formulations (prescription only):
  • Testosterone gels: AndroGel, Testim (easy daily dosing, steady T but possible transfer to others).
  • Patches: Androderm (daily patch).
  • Injections: Depo-Testosterone (testosterone cypionate) — common, cost-effective; Nebido (testosterone undecanoate) — long-acting, infrequent dosing.
  • Pellets: Testopel (implanted pellets that release testosterone over months).
    Use of any therapy should follow a physician’s prescription and monitoring plan.

If you want, tell me your age, symptoms, and a recent morning testosterone result (with units) and I can help interpret it and recommend next steps.