The conversation around testosterone has become so loud and commercially driven that it’s genuinely difficult for men to separate what’s accurate from what’s being sold to them. Testosterone is promoted as the explanation for everything from fatigue to relationship problems, and TRT clinics have multiplied across New York alongside the marketing. At the same time, clinically significant testosterone deficiency is real, it is underdiagnosed in some men who are suffering from it, and it has specific symptoms and specific treatments with specific trade-offs. At Lazare Urology in Brooklyn, testosterone evaluation is approached as the medical question it actually is – distinct from the supplement market on one side and the TRT-for-everyone posture on the other. The starting point is accurate diagnosis, and accurate diagnosis requires understanding what low testosterone actually looks like clinically and how it’s properly measured.
What Low Testosterone Actually Feels Like – And What It Doesn’t
The symptoms that are genuinely associated with clinical testosterone deficiency are specific enough to be useful, and they’re different from the general “feeling run down” complaints that direct-to-consumer testosterone marketing tends to claim.
Decreased libido – a reduction in sexual desire that feels qualitatively different from stress-related fluctuation – is among the most consistent symptoms of low testosterone. This is distinct from erectile dysfunction, which is driven primarily by vascular mechanisms and is frequently present in men with normal testosterone. Conflating the two is a clinical error that leads to mismanagement in both directions.
Fatigue that doesn’t respond to adequate sleep, reduced motivation and energy that feel constitutional rather than situational, and difficulty maintaining muscle mass despite appropriate exercise are legitimate associated symptoms. So is depressed mood – testosterone has real effects on central nervous system function and mood, and some men with low testosterone experience a low-grade depressive state that improves with treatment.
What is less reliable: using testosterone level to explain non-specific symptoms in men whose levels are within the normal range. A man with a total testosterone of 450 ng/dL who feels tired is probably not tired because of his testosterone level. Symptoms in the context of normal levels warrant evaluation of other causes rather than treatment.
The picture becomes complicated because the normal range for testosterone is wide – generally considered to be approximately 300 to 1,000 ng/dL in most laboratory references – and “normal” for one man may be suboptimal for another. This is why symptoms matter alongside numbers, and why the clinical picture, not the number alone, drives treatment decisions.
How Testosterone Is Properly Measured
A single testosterone measurement taken at an arbitrary time of day is an inadequate basis for a diagnosis of hypogonadism. Understanding why requires understanding how testosterone is secreted.
Testosterone secretion follows a circadian pattern, with levels peaking in the morning (typically between 8 and 10am) and declining through the afternoon. A testosterone level drawn at 3pm will be meaningfully lower than one drawn at 8am in the same man. The standard recommendation is that total testosterone measurements used for diagnostic purposes be obtained in the morning, and that a low value be confirmed on a second morning draw on a different day before a diagnosis is made.
Total testosterone measures both the testosterone bound to sex hormone binding globulin (SHBG) and albumin, and the free fraction that is bioavailable. Because SHBG levels vary among men and increase with age, total testosterone can be misleading. A man with high SHBG will have a normal-appearing total testosterone while having a low free testosterone and experiencing symptoms consistent with deficiency. Free testosterone measurement, or calculated free testosterone using total testosterone and SHBG, adds meaningful information in men with borderline total testosterone levels or discordant clinical pictures.
The complete evaluation for suspected testosterone deficiency includes LH and FSH – the pituitary hormones that regulate testicular testosterone production. This distinction matters clinically: primary hypogonadism (testicular failure) produces low testosterone with elevated LH and FSH, while secondary hypogonadism (pituitary or hypothalamic dysfunction) produces low testosterone with low or inappropriately normal LH and FSH. The pattern affects both the diagnostic workup and the treatment approach.
Prolactin, thyroid function, and complete blood count round out the initial hormonal evaluation. An elevated prolactin, for instance, suggests a pituitary adenoma as the underlying cause – a finding that requires imaging and management quite different from idiopathic hypogonadism.
Treatment Options and Their Real-World Trade-Offs
Testosterone replacement therapy is the treatment for confirmed, symptomatic hypogonadism, and it comes in several delivery forms with different practical characteristics.
Injectable testosterone – testosterone cypionate or enanthate – is the most cost-effective option and produces the most physiologically significant testosterone levels. It’s administered via intramuscular or subcutaneous injection typically every one to two weeks, either self-administered at home or in a clinical setting. The limitation is cycling: levels peak after injection and decline before the next dose, which some men experience as symptomatic fluctuation.
Topical gels and creams produce more stable levels by delivering testosterone transdermally daily. The limitation is transfer risk – physical contact with others, including children and female partners, can result in inadvertent testosterone exposure. Proper hygiene and application protocols reduce but don’t eliminate this risk.
Pellet implants deliver testosterone from small subcutaneous implants placed in the buttock or hip, releasing testosterone steadily over three to six months. Pellets produce stable levels without daily administration requirements, but the procedure involves a minor in-office placement, and dose adjustment after placement isn’t possible until the pellet dissolves.
The trade-off that matters most for men in their reproductive years is fertility. Exogenous testosterone suppresses LH and FSH through negative feedback on the hypothalamic-pituitary axis, which reduces intratesticular testosterone – the high concentration of testosterone in the testicular environment that is required for normal spermatogenesis. Men on standard testosterone replacement therapy typically develop significantly impaired or absent spermatogenesis, and in some cases this suppression persists for months or years after stopping therapy.
For men who have not completed their family, the alternative is either delaying testosterone treatment, or using agents that stimulate the body’s own testosterone production rather than replacing it exogenously. Clomiphene citrate (clomid) blocks estrogen receptors in the hypothalamus and pituitary, increasing LH and FSH secretion and thereby stimulating testicular testosterone production and spermatogenesis simultaneously. Human chorionic gonadotropin (hCG) directly stimulates testicular testosterone production. These approaches are used in hypogonadal men who want to preserve fertility, and they require a urologist or endocrinologist experienced in their use – not the direct-to-consumer TRT model, which rarely engages this nuance.
How Testosterone Intersects With Erectile Dysfunction
Testosterone and erectile dysfunction are related but not the same problem, and treating one doesn’t necessarily address the other. Testosterone drives libido and sexual motivation; erection is primarily a vascular event dependent on arterial inflow and venous occlusion. A man with severely low testosterone and a fully intact vascular system may have reduced desire but preserved erectile capacity. A man with normal testosterone and significant vascular disease may have strong libido but consistent erectile dysfunction.
In practice, many men who present with a combination of low desire and ED have both problems, and the evaluation needs to address both rather than assuming that testosterone treatment will resolve the erectile issue. Men on testosterone replacement who continue to have ED after libido improves are responding to the treatment’s effect on desire but have a separate vascular problem that needs its own evaluation and management.
Getting an Accurate Evaluation at Lazare Urology in Brooklyn
If you’ve had testosterone measured by a direct-to-consumer service, had it checked at a time other than morning, or have one low result without a confirming measurement, you may not have the information you need to make a treatment decision. If you have symptoms that are genuinely consistent with testosterone deficiency and haven’t been properly evaluated, you may be waiting too long for something that has a real answer.
Lazare Urology evaluates testosterone in the context of a complete hormonal and clinical picture, addresses the fertility question for men who need it addressed, and manages the intersection of testosterone and sexual function as the integrated clinical picture it is. Contact the office to schedule a consultation for men in Brooklyn, Manhattan, Queens, and the surrounding New York boroughs.