In the adult male, testosterone maintains the structure and function of the prostate, testes, seminal vesicles, and external male genitalia. In addition, testosterone affects lean body mass, bone density, hematopoiesis, libido and mood.

Testosterone levels in saliva are an accepted method for assessment of hypogonadism in men. In women, high testosterone, often caused by ovarian cysts, leads to conditions such as excessive facial and body hair, acne, and oily skin and hair. Low testosterone in postmenopausal women, seen particularly after surgical removal of the ovaries, leads to female symptoms of androgen deficiency including loss of libido, thinning skin, vaginal dryness, and loss of bone and muscle mass.

Testosterone is the major androgen in the body. It is converted to dihydrotestosterone by 5-alphareductase, and to estradiol by aromatase.

Testosterone is the major androgen in the body. It is converted to dihydrotestosterone by 5-alphareductase, and to estradiol by aromatase.

Testosterone is a male sex hormone or androgen. It is generally low in women and children, but it can be elevated in certain diseases. A certain level of testosterone is important for development and maturation in both genders.

Testosterone is the major androgen in the body. It is converted to dihydrotestosterone by 5-alphareductase, and to estradiol by aromatase.

Testosterone is the major androgen in the body. It is converted to dihydrotestosterone by 5-alphareductase, and to estradiol by aromatase.

Testosterone, the primary male sex hormone, is a vital marker in the Comprehensive 24-Hour Urine Steroid Hormone Profile Test, signifying its paramount importance in assessing male health and hormonal function. Testosterone plays a crucial role in developing and maintaining male characteristics, influencing muscle mass, bone density, libido, and overall energy levels. In the context of a 24-hour urine test, the measurement of testosterone offers an extensive view of its daily production and metabolism, providing a more accurate reflection of the hormone's activity than a single blood test. This method captures the fluctuations in testosterone levels throughout the day, offering crucial insights into the endocrine system's functioning.

Testosterone, the primary male sex hormone, is a key focus in the ZRT Laboratory Urinary Neurotransmitters panel, highlighting its paramount importance in men's health and endocrinology. This hormone plays a central role in male physiology, influencing muscle mass, bone density, fat distribution, and red blood cell production. Beyond physical attributes, testosterone is critical for libido, sexual function, mood regulation, and cognitive abilities. In men, optimal testosterone levels are essential for overall health and well-being.

In the adult male, testosterone maintains the structure and function of the prostate, testes, seminal vesicles, and external male genitalia. In addition, testosterone affects lean body mass, bone density, hematopoiesis, libido and mood.

Testosterone is the major anabolic androgen found in females. Because urinary testosterone levels are independent of circadian rhythm fluctuation, urine may be a better medium than serum to indicate androgen production.

The ratio of Testosterone to Epi-Testosterone in pre-menopausal women, as part of a Human Urinary Metabolic Profile (HUMAP) panel, is a significant indicator of hormonal balance and metabolic function. Testosterone, although primarily considered a male hormone, plays a vital role in women's health too, influencing muscle mass, bone density, libido, and overall well-being. Epi-Testosterone, while not an active androgen itself, serves as an important reference point in evaluating the balance of androgenic activity. In pre-menopausal women, this ratio is crucial as it can reveal insights into various physiological and pathological states. A balanced Testosterone/Epi-Testosterone ratio is expected in healthy individuals, maintaining the delicate interplay of hormonal activities crucial for physical health, emotional well-being, and reproductive function.

Testosterone is the main hormone responsible for the development of secondary sex characteristics in men. Testosterone is produced mainly in the testicles and partially by the adrenal glands. In women, low levels of testosterone are produced by the adrenal glands. In men, about half of blood testosterone is present in an inactive form (bound to SHBG), and the other half is present in a free form or weakly bound to albumin. The total free and albumin-bound forms constitute bioavailable testosterone. Total testosterone levels are generally an accurate representation of the biological activity of testosterone in the tissues. Certain conditions may interfere with this interpretation. In such cases, free or bioavailable testosterone levels are clinically more useful.

Bioavailable testosterone, a crucial hormone in men's health, plays an essential role in maintaining various bodily functions. This form of testosterone, which is readily available for the body's use, significantly influences muscle strength, bone density, and sexual function.

Testosterone, though commonly associated with male physiology, is an essential hormone in females as well. Free testosterone represents the unbound form of the hormone, which is biologically active and available to the body’s tissues. It plays a crucial role in numerous physiological functions and maintaining overall health.