TRT Requirements: Who Qualifies for Testosterone Therapy

If you feel worn out, your drive has dropped, and you wonder whether testosterone therapy could help, the first question is simple: do you qualify? TRT requirements are not a secret checklist set by each clinic. They come from published medical guidelines, and they rest on two things that must both be true: you have symptoms consistent with low testosterone, and blood tests confirm your levels are low.

This article explains those requirements in plain language, including the lab thresholds guidelines use, how testing should be done, and the health conditions that can rule treatment out or call for more evaluation first.

The Two Core TRT Requirements: Symptoms Plus Low Labs

The Endocrine Society recommends diagnosing hypogonadism (low testosterone) only in men who have symptoms and signs consistent with testosterone deficiency and unequivocally and consistently low testosterone levels (Bhasin et al., Endocrine Society Clinical Practice Guideline, 2018).

The American Urological Association takes the same approach. Its guideline defines testosterone deficiency as low testosterone combined with symptoms or signs, and it notes that candidacy for treatment requires both (American Urological Association).

That means a low number with no symptoms is not enough, and symptoms with a normal number are not enough either. Both pieces matter.

Requirement 1: Symptoms Consistent With Low Testosterone

Cleveland Clinic notes that sexual symptoms are the most specific signs of low testosterone (Cleveland Clinic). These include:

• Low sex drive
• Fewer morning or spontaneous erections
• Trouble getting or keeping an erection

Other symptoms that strongly suggest low testosterone include loss of armpit and pubic hair, shrinking testicles, hot flashes, and low sperm count. Less specific signs include low mood, poor concentration, more body fat, less muscle strength, and lower endurance (Cleveland Clinic).

The AUA points out that many of these symptoms are nonspecific and can come from other conditions such as chronic stress, depression, or fatigue from other causes (AUA). A good evaluation looks at the whole picture. For a fuller list, see our guide to the signs of low testosterone.

Requirement 2: Confirmed Low Testosterone on Blood Tests

The threshold

Cleveland Clinic states that healthcare providers consider total testosterone below 300 ng/dL low in adults (Cleveland Clinic).

Lab reference ranges differ because assays differ. A study co-authored with the Centers for Disease Control and Prevention set a harmonized normal range of 264 to 916 ng/dL for healthy, non-obese men aged 19 to 39 (Travison et al., Journal of Clinical Endocrinology & Metabolism, 2017). That is why you may see a lower limit near 264 ng/dL on some lab reports instead of 300.

Benchmark	Value	Source
Commonly used “low” cutoff in adults	Below 300 ng/dL	Cleveland Clinic
Harmonized lower limit (2.5th percentile), non-obese men 19 to 39	264 ng/dL	Travison et al., 2017
Harmonized median, same group	531 ng/dL	Travison et al., 2017
Harmonized upper limit (97.5th percentile), same group	916 ng/dL	Travison et al., 2017

For full age-by-age ranges, see our testosterone levels by age chart.

How the test should be done

Guidelines are specific about testing because testosterone moves around during the day and can drop during illness:

• Morning draw. The Endocrine Society recommends a fasting, morning total testosterone measured with an accurate, reliable assay as the first test (Endocrine Society, 2018).
• Repeat it. The diagnosis should be confirmed with a second morning fasting total testosterone (Endocrine Society, 2018). Cleveland Clinic notes the test usually requires two separate morning samples.
• Free testosterone when needed. If total testosterone is near the lower limit, or you have a condition that changes SHBG (the protein that binds testosterone), the guideline recommends measuring or accurately calculating free testosterone (Endocrine Society, 2018).
• Not while sick. Illness can temporarily lower testosterone, so tell your provider if you are unwell around the time of testing (Cleveland Clinic).

For a breakdown of what each TRT blood test checks, before and during treatment, see our blood work guide.

Do age and weight change the picture?

The basic requirements are the same at any adult age, but context matters. Cleveland Clinic notes that testosterone can drop about 1% per year starting in the late 30s, and that low testosterone is more likely in men who are older than 45, have obesity, have poorly managed type 2 diabetes, or have obstructive sleep apnea (Cleveland Clinic). The harmonized reference study also found that testosterone levels in non-obese men were higher than in the overall group of men studied (Travison et al., 2017). A provider weighs these factors when deciding whether a result is truly low for you.

Requirement 3: Looking for the Cause

Once low testosterone is confirmed, the Endocrine Society recommends further evaluation to find out why (Endocrine Society, 2018). Common follow-up tests include:

• LH and FSH (luteinizing and follicle-stimulating hormone) to help show whether the issue starts in the testicles or in the pituitary gland (MedlinePlus; Cleveland Clinic).
• Prolactin to look for high levels that can point to a pituitary problem (Cleveland Clinic).

Cleveland Clinic notes that most men with low testosterone symptoms do not have a pituitary or testicle disease. Obesity and diabetes are more common drivers (Cleveland Clinic). That matters because addressing those conditions can be part of the plan.

Health Conditions That Can Rule Out TRT

Meeting the symptom and lab requirements does not automatically mean treatment is safe. The Endocrine Society recommends against starting testosterone in men who (Endocrine Society, 2018):

• Plan to father a child in the near term
• Have breast or prostate cancer
• Have a palpable prostate nodule, or a PSA above 4 ng/mL (or above 3 ng/mL in men at higher risk) without urologic evaluation
• Have an elevated hematocrit
• Have untreated severe obstructive sleep apnea
• Have severe lower urinary tract symptoms
• Have uncontrolled heart failure
• Had a heart attack or stroke within the last six months
• Have thrombophilia (a clotting disorder)

Several of these items show up on lab work, so a provider will usually check baseline safety labs such as hematocrit and, depending on age and risk, PSA before starting.

The FDA also notes that testosterone products are approved for men who have low testosterone together with an associated medical condition, and the labeling keeps a “Limitation of Use” for age-related low testosterone. In 2025 the agency added a blood pressure warning across testosterone products (U.S. Food and Drug Administration).

What Happens After You Qualify

If you meet the requirements and there is no reason to avoid treatment, the decision to start is shared between you and your provider after discussing benefits, risks, and monitoring. The Endocrine Society suggests aiming for testosterone in the mid-normal range on treatment, and monitoring symptoms, testosterone, hematocrit, and prostate health during the first year (Endocrine Society, 2018).

If you are ready to take the next step, our guide on how to get a TRT prescription online walks through the process, and our testosterone replacement therapy page explains how treatment and follow-up work with us.

Quick Summary of TRT Requirements

• Symptoms consistent with low testosterone, especially sexual symptoms.
• Two morning fasting total testosterone tests showing consistently low levels, commonly below about 300 ng/dL, interpreted against the lab’s range.
• Free testosterone when total is borderline or SHBG may be abnormal.
• An evaluation of the cause, often including LH, FSH, and prolactin.
• No conditions that make treatment unsafe, or a plan to address them first.

Talk to a Licensed Provider

Not sure whether you meet the requirements? A licensed provider can review your symptoms and labs, order what is missing, and tell you honestly whether treatment makes sense. MultiGen Wellness is $247 to start (includes your first provider visit), then $97 per visit. Request a consultation or call 1-800-259-0015.

This article is for general education and is not medical advice. Only a licensed provider who has evaluated you can decide whether testosterone therapy is appropriate.