Low testosterone in Black men: real symptoms, testing, and what treatment can and cannot do

Testosterone is the main male sex hormone. When the body does not make enough of it, and that shortfall produces real symptoms, the medical term is hypogonadism. That is a legitimate condition with legitimate treatment.

The problem is the marketing around it. "Low T" clinics, supplement brands, and telehealth funnels have turned a specific endocrine diagnosis into a catch-all for any man who feels tired, stressed, or less interested in sex. The Endocrine Society's clinical practice guideline is direct about this: testosterone should be diagnosed only in men who have both symptoms and unequivocally low measured levels, not in men who simply feel run down (Bhasin et al., Endocrine Society Guideline 2018, PMID 29562364). The American Urological Association says the same thing and warns against treating a number on a lab report when there are no symptoms, or symptoms when the number is normal (Mulhall et al., AUA Guideline 2018, PMID 29601923).

The reason this matters is that the symptoms of low testosterone overlap with the symptoms of being middle-aged, overweight, poorly slept, or depressed. Sell testosterone to all of those men and most will report feeling better for a while. That is not evidence the hormone fixed anything specific. It is why evidence-based clinicians test twice and rule out other causes before writing a prescription.

Not all symptoms carry equal weight. The guideline evidence separates the specific signs from the vague ones.

The most specific symptoms, the ones most strongly tied to genuinely low levels, are sexual:

• Reduced sex drive (libido)
• Fewer or absent morning erections (loss of morning erections)
• Erectile difficulty
• Reduced spontaneous erections

Less specific symptoms, which often have other causes, include:

• Persistent fatigue and low energy
• Depressed mood, irritability, or poor concentration
• Loss of muscle mass and strength
• Increased body fat
• Reduced bone density, which over time raises fracture risk

The Endocrine Society lists the sexual symptoms as the most reliable signal because they correlate best with measured deficiency (Bhasin et al., Endocrine Society Guideline 2018, PMID 29562364). Fatigue and mood changes are real and worth taking seriously, but on their own they point to low testosterone far less reliably than the sexual symptoms do. If your only complaint is tiredness, low testosterone is one of the less likely explanations.

A note for Black men specifically: there is no separate symptom list. The symptoms are the same. What differs is the surrounding risk picture, especially prostate cancer, which is covered below.

This is where most "low T" pathways cut corners. Done right, testing follows a clear sequence.

Measure total testosterone in the morning, fasting. Testosterone follows a daily rhythm and peaks in the morning, and food can lower it. A level drawn in the afternoon or after a meal can read falsely low. Both the Endocrine Society and the AUA specify an early-morning, fasting total testosterone as the first test (Bhasin et al., 2018, PMID 29562364; Mulhall et al., 2018, PMID 29601923).

Confirm it with a second morning test. A single low reading is not a diagnosis. Levels vary day to day, and roughly a third of men with one low result will be normal on a repeat. The diagnosis requires two low morning measurements on separate days (Bhasin et al., 2018, PMID 29562364; Mulhall et al., 2018, PMID 29601923). The AUA uses a total testosterone below 300 ng/dL, combined with symptoms, as a reasonable threshold for diagnosis (Mulhall et al., 2018, PMID 29601923).

Symptoms plus the numbers, together. A low number with no symptoms does not warrant treatment, and symptoms with normal numbers point you toward a different cause. Both must line up (Bhasin et al., 2018, PMID 29562364; Mulhall et al., 2018, PMID 29601923).

If you are evaluating telehealth or a clinic, the test is simple: do they require two morning blood draws before prescribing? If they prescribe off one test, an afternoon test, or a symptom questionnaire alone, they are not following the guidelines. To find a clinician who will evaluate this properly rather than upsell, start with our provider directory.

Testosterone therapy clearly helps a specific group: men with consistently low morning levels and real symptoms, especially when the cause is a structural or medical problem with the testes, pituitary, or hypothalamus. For these men, therapy can improve libido, erectile function, mood, bone density, and anemia (Bhasin et al., 2018, PMID 29562364; Lincoff et al., TRAVERSE, NEJM 2023, PMID 37326322).

The men being oversold are different. They are men with borderline or normal levels, men whose only symptom is fatigue, and above all men whose low readings are driven by reversible conditions like obesity. The 2025 review on low testosterone in men with obesity is blunt about this: in men whose low levels come from carrying excess weight rather than from disease of the hormone-producing organs, "treatment with testosterone should be avoided," because weight loss through diet, exercise, or surgery is "the only appropriate treatment" and can substantially raise levels on its own (Muir et al., J Clin Endocrinol Metab 2025, PMID 40052430).

The FDA reinforces this from the regulatory side. Testosterone products are approved for men with low levels caused by specific medical conditions, not for the natural decline that comes with aging. The agency has repeatedly cautioned against prescribing it for "low testosterone due to aging" (FDA, class-wide labeling changes for testosterone products, 2025). If a clinic is pitching testosterone as an anti-aging or vitality treatment, that use is outside what the FDA has approved.

Therapy is not free of consequences. An honest evaluation covers all of them.

Fertility. This is the risk most often glossed over. Testosterone given as therapy shuts down the body's own signal to produce sperm, and it can drive sperm counts to zero. In one body of evidence on testosterone as a contraceptive, the majority of men became azoospermic within months (Patel et al., World J Mens Health 2019). The suppression is usually reversible after stopping, but recovery can take from a few months up to two years, and is not guaranteed to be complete in every man (Patel et al., 2019). The Endocrine Society guideline therefore recommends against starting testosterone in men who want to father children in the near term (Bhasin et al., 2018, PMID 29562364). If fertility matters to you at all, sperm banking before treatment is the protective move.

Cardiovascular safety. This was the central controversy for a decade. Studies in 2013 and 2014 raised alarms, and in 2015 the FDA added a warning about possible heart attack and stroke risk (FDA, 2025). The large randomized TRAVERSE trial, published in 2023, was designed to settle it. Among more than 5,000 middle-aged and older men with low testosterone and high cardiovascular risk, testosterone did not increase major cardiac events compared with placebo (Lincoff et al., TRAVERSE, NEJM 2023, PMID 37326322). On the strength of that trial, the FDA removed the boxed cardiovascular warning in 2025 (FDA, 2025). The caveat: TRAVERSE found more cases of atrial fibrillation (an irregular heartbeat) in the testosterone group, and the FDA also flagged blood-pressure increases with some products (Lincoff et al., 2023, PMID 37326322; FDA, 2025). So the heart-attack fear was not borne out, but testosterone is not risk-free for the heart.

Prostate monitoring. Testosterone therapy requires PSA and prostate monitoring before starting and during treatment, because it can stimulate prostate tissue (Bhasin et al., 2018, PMID 29562364). This matters more for Black men. Prostate cancer develops earlier and is more lethal in Black men, and the Prostate Cancer Foundation recommends baseline PSA testing as early as ages 40 to 45 for Black men, rather than 50 to 55 (Garraway et al., PCF Screening Guidelines, NEJM Evid 2024). Any clinician starting you on testosterone should fold this into the plan, not treat it as an afterthought.

Other effects. Therapy can raise red blood cell counts to levels that require monitoring, can worsen untreated sleep apnea, and shrinks the testes during treatment (Bhasin et al., 2018, PMID 29562364). None of these are reasons to never use testosterone. They are reasons to be on it for a real diagnosis, under real monitoring.

Because low-testosterone symptoms are so non-specific, the conditions that mimic or cause them deserve a hard look before any hormone prescription.

Obesity and type 2 diabetes. These are the most common drivers of low testosterone in adult men, and the link is reversible: losing weight and controlling blood sugar raises levels measurably (Muir et al., 2025, PMID 40052430). This is the single most overlooked fix.

Obstructive sleep apnea. Untreated sleep apnea is associated with lower testosterone, and it independently causes the fatigue, low mood, and low libido that get blamed on low T (Muir et al., 2025, PMID 40052430). If you snore heavily, wake unrefreshed, or have been told you stop breathing in your sleep, get evaluated. Our guide to sleep apnea signs in Black adults walks through what to watch for.

Depression. Depression produces fatigue, low libido, poor concentration, and low motivation, the exact cluster that "low T" marketing targets. Treating the depression often resolves the symptoms (Muir et al., 2025, PMID 40052430).

Thyroid disease and medications. Underactive thyroid and certain medications, including opioids and some others, suppress testosterone or mimic its symptoms, and managing them is part of a proper workup (Muir et al., 2025, PMID 40052430).

The practical takeaway: a workup that jumps straight to a testosterone prescription without checking weight, blood sugar, sleep, mood, and medications is incomplete. If erectile difficulty is the main concern, it frequently has a vascular or medical cause rather than a hormonal one, and our overview of online ED treatment options covers what is actually evidence-based.