Total Testosterone


Testosterone is a naturally occurring hormone usually associated with “male” development but also found in women.  Testosterone levels decrease in men as they age and can be associated with a variety of symptoms.  Women may also have symptoms from elevated levels of testosterone.  This test can be used in pediatric patients to assess puberty.  For adult men, where testosterone testing is most commonly necessary, it is used to diagnose Low-T

Sample Type

  • 1 mL serum collected in SST

Who should get a Total Testosterone?

Testosterone is the predominant male sex hormone which controls male sexual development and functions. Testosterone levels vary with age. During puberty (teen years), testosterone levels are associated with pubertal changes including the development of body hair, changes in voice and increased muscle mass. Testosterone levels will decrease with age as part of the normal physiology of aging. However, lower than normal testosterone or decreased testosterone can result in Low Testosterone (Low-T), or Testosterone Deficiency Syndrome (TD). Low-T can result in a variety of symptoms including:

  • Decreased sex drive and libido
  • Fatigue
  • Erectile Dysfunction
  • Reduced muscle mass
  • Fatigue
  • Low Energy Levels
  • Infertility

Testosterone levels also can be impacted by aging, obesity, metabolic syndrome, diabetes, and the use of certain medications including anti-depressants and narcotic pain medications. Testosterone levels can also decrease in health conditions such as HIV. Testosterone levels should also be measured to monitor treatment in those taking testosterone supplementation.

Testosterone Levels in Women

For females, a testosterone test may be appropriate as part of a hormonal workup. Signs of elevated testosterone include:

  • Abnormal or excessive hair growth
  • Low voice
  • Irregular periods
  • Infertility
  • Acne

Turnaround Time

  • Note: Result turnaround times are only an estimate and may be subject to change.
  • Test turnaround time for the Testosterone Blood Test is typically 3-5 business days.

Patient Preparation

  • Testosterone levels are usually measured serially for assessment.  Ideally, an early morning sample is best for measuring testosterone


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