Who Is and Isn't a Candidate for TRT: Low Testosterone or Something Else?

Wondering whether your symptoms fit at all? Start with our main guide: Low Testosterone Symptoms in Men - signs, causes and when to seek treatment. This page covers the narrower question of candidacy: who testosterone therapy suits, and who it does not.

Candidacy is two things at once, not one

The Endocrine Society clinical practice guideline is unambiguous on this point: a diagnosis of hypogonadism should be made only in men with symptoms and signs consistent with testosterone deficiency AND unequivocally and consistently low serum testosterone concentrations (Bhasin et al., J Clin Endocrinol Metab 2018, DOI: 10.1210/jc.2018-00229).

Both halves are load-bearing. Symptoms without confirmed low levels means the cause is still unidentified. Low levels without symptoms means there is nothing yet to treat. Either way, the honest next step is more information, not a prescription.

"Consistently low" is also doing real work. It means a fasting morning draw, repeated on a second morning, because a single afternoon result is not a diagnosis. The mechanics of that are covered in free vs total testosterone and how to read your lab panel.

Who tends to be a strong candidate

Testosterone therapy fits best when the following line up:

• Three or more core symptoms that have persisted for months rather than weeks - fatigue that sleep does not fix, reduced libido, loss of morning erections, muscle that will not build alongside fat that will not shift, flattened drive, and cognitive fog.
• Two morning fasting testosterone levels that are genuinely low, with free testosterone and SHBG measured rather than inferred.
• A cause that has been looked for - LH and FSH checked to distinguish a testicular from a pituitary picture, and the common confounders below ruled out or addressed.
• No condition on the caution list, or one that has been evaluated and managed first.
• A willingness to be monitored. Treatment is a long-term relationship with a lab schedule attached, not a one-off prescription.
• Family planning settled, or a fertility-preserving strategy agreed before the first dose.

Age is not on that list, and it should not be. A man in his thirties with confirmed deficiency and matching symptoms is a more appropriate candidate than a symptom-free man in his sixties.

Symptoms that usually point somewhere else

This is the part most testosterone programs skip, and it matters. The wrong diagnosis means a long-term prescription that never addresses the actual problem.

Cold intolerance, dry skin, constipation, hair thinning. These point toward thyroid rather than testosterone. Thyroid dysfunction mimics low testosterone closely, is frequently missed when only TSH is checked, and also shifts SHBG - which changes how your testosterone results should be interpreted in the first place.

Afternoon crashes and intense carbohydrate cravings. More suggestive of insulin resistance or blood sugar instability. Insulin resistance also lowers SHBG, which distorts the whole panel.

Waking at 3am consistently, or feeling wired but exhausted. Often a cortisol and stress-axis pattern.

Snoring, unrefreshing sleep, daytime sleepiness. Sleep apnea produces almost every symptom on the low testosterone list, and it lowers testosterone directly. Treating the testosterone without treating the apnea addresses the symptom and ignores the cause - and untreated severe sleep apnea is itself a reason to hold off on starting.

Significant excess weight. Adipose tissue converts testosterone to estradiol and drives down SHBG. In some men this is a genuinely correctable driver, and addressing it moves the whole panel.

The honest position is that these conditions overlap heavily and frequently coexist. That is precisely why a single testosterone reading is not an evaluation.

When testosterone therapy should wait

There are situations where testosterone is not the right next step, or where something needs to be evaluated and managed first. The Endocrine Society guideline advises against starting testosterone therapy in men who are planning fertility in the near term, or who have any of the following (DOI: 10.1210/jc.2018-00229):

• Breast or prostate cancer
• A palpable prostate nodule or induration
• PSA above 4 ng/mL, or above 3 ng/mL in men at increased risk of prostate cancer, without further urological evaluation first
• An elevated hematocrit at baseline
• Untreated severe obstructive sleep apnea
• Severe lower urinary tract symptoms
• Uncontrolled heart failure
• Myocardial infarction or stroke within the last six months
• Thrombophilia

Several of these are timing issues rather than permanent exclusions. Sleep apnea that gets treated, a hematocrit that comes down, a prostate question that gets answered - each can change the picture, and a good evaluation says which of those applies to you.

What the cardiovascular evidence actually supports

Men with heart disease often assume they are automatically excluded. The evidence is more encouraging than that. The TRAVERSE trial enrolled 5,246 men aged 45 to 80 with symptomatic hypogonadism and either existing or high-risk cardiovascular disease, and found daily transdermal testosterone noninferior to placebo for the composite of cardiovascular death, nonfatal myocardial infarction and nonfatal stroke (hazard ratio 0.96; 95% CI 0.78 to 1.17) over a mean follow-up of 33.0 months. The trial did record a higher incidence of atrial fibrillation, acute kidney injury and pulmonary embolism in the testosterone group (Lincoff et al., N Engl J Med 2023, DOI: 10.1056/NEJMoa2215025).

Read plainly: existing cardiovascular disease is not by itself a bar to candidacy. It is a reason for a careful individual assessment and a monitoring plan that includes kidney function and awareness of clotting and rhythm symptoms.

Fertility: raise it before you start, not after

This is the single most common conversation men tell us nobody had with them. Exogenous testosterone suppresses the pituitary signals that drive sperm production, and that effect is meaningful.

If children may be in your future - even uncertainly, even years out - say so at the first visit. There are approaches that raise testosterone while preserving spermatogenesis, and adjuncts that can be used alongside treatment. All of them are far easier to plan for at the start than to retrofit later.

What confirms candidacy in practice

A meaningful evaluation covers, at minimum:

• Total and free testosterone, on two fasting morning draws
• SHBG, because it determines how much of your total is usable
• Estradiol, ideally by a sensitive assay
• LH and FSH, to locate the problem
• Full thyroid panel - TSH, Free T3, Free T4, reverse T3
• Metabolic markers - fasting insulin, HbA1c, lipids
• Cortisol and DHEA-S
• Hematocrit and PSA, as the baselines required before any treatment
• Vitamin D and ferritin, which produce overlapping fatigue
• A sleep history, and a sleep study where the picture warrants one

What each of those numbers means is covered in free vs total testosterone and how to read your lab panel.

If you are a candidate, what comes next

• Choosing a format: pellets vs injections vs gels
• What it costs and what is tracked: TRT cost and monitoring
• The full treatment picture: testosterone replacement therapy for men in Ann Arbor

Getting evaluated in Ann Arbor

Arbour Longevity evaluates low testosterone in Ann Arbor with comprehensive laboratory testing rather than a symptom questionnaire, and will tell you plainly if testosterone is not the answer your results point to. Protocols are designed and monitored by Gandhi Bhattarai, FNP-BC, PMHNP-BC, Anti-Aging/Functional Medicine BC, a triple board certified nurse practitioner, and delivered by injection, cream or pellet depending on what fits your life.

Read more about hormone optimization, our approach to hormone replacement therapy in Ann Arbor, or what our lab panels cover.

Arbour Longevity is at 2217 Packard St #15 in Ann Arbor, serving Ypsilanti, Saline, Dexter, Chelsea and Washtenaw County, with telehealth follow-up across Michigan. Open Thursday through Monday, 10:00 to 19:00, closed Tuesday and Wednesday. Parking is free and directly outside - no meters and no parking structure. Suite 15 is down a flight of stairs, so please call ahead if stairs are difficult for you. Your first visit is $35, applied toward your treatment plan. HSA and FSA cards accepted. Call (734) 436-3357 or book your $35 consultation.

References

1. Bhasin S, Brito JP, Cunningham GR, et al. Testosterone Therapy in Men With Hypogonadism: An Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab. 2018;103(5):1715-1744. PMID 29562364. DOI: 10.1210/jc.2018-00229
2. Lincoff AM, Bhasin S, Flevaris P, et al. Cardiovascular Safety of Testosterone-Replacement Therapy (TRAVERSE). N Engl J Med. 2023;389(2):107-117. PMID 37326322. DOI: 10.1056/NEJMoa2215025

This article is educational and does not replace individualized medical advice.