How is Testosterone Measured in a Blood Test?
If you’ve ever wondered how testosterone levels are measured in a blood test, you’ve come to the right place. In this article, we’ll discuss how a blood test is performed, the various methods of measuring testosterone levels, and how to interpret the results. You’ll also learn about the differences between free and bioavailable testosterone, and how to read and interpret your test results. Despite the various methods of testing testosterone, the most common one is the total testosterone test.
Testosterone levels are measured in a blood test
You might have wondered how testosterone levels are measured in a blood test. There are a few different methods. The most common test is the total testosterone test, which measures both free and bound levels. Total testosterone levels are often reported in nanograms per deciliter of blood, while free testosterone is measured in picograms per deciliter of blood. Less commonly measured is bioavailable testosterone, which includes free and albumin-bound testosterone. This type of blood test usually reports levels in nanograms per deciliter of blood.
The normal range for testosterone levels varies from person to person. A low testosterone level may be caused by Addison’s disease, a disorder of the pituitary gland. A high testosterone level may be a sign of cancer of the testicles or adrenal glands. Low testosterone in boys may be a sign of injury or illness. Certain medicines may affect testosterone levels. Discuss your results with your provider and ask about any treatment options.
Tests for bioavailable or free testosterone are preferred tests for mild hypogonadism in older men
Among the different tests used for the diagnosis of mild hypogonadism in older males, tests for bioavailable or free testosterone are the most useful. Both tests have a high correlation coefficient (0.9606), meaning that bioavailable testosterone more accurately reflects total bioactive testosterone. Since SHBG and albumin levels vary among older men, it is important to request tests for free testosterone before ordering SHBG tests.
When bioavailable or free testosterone levels are low, it’s likely that a pituitary tumour is the cause of the decreased testosterone levels. Secondary hypogonadism can also be caused by a prolactinoma, a common pituitary tumour. In such a case, testosterone replacement therapy is a last resort, as lifestyle changes can improve the condition.
Interpreting results of a testosterone blood test
A testosterone blood test can be interpreted in many ways. It can tell if a man has reached precocious puberty, if he’s showing signs of secondary sex characteristics such as a bigger penis, and if his body is developing muscle mass. Testosterone levels can also be measured in other ways, including by measuring the levels of other androgens such as DHT and cortisol.
A testosterone blood test measures both free and attached testosterone. Free testosterone levels can help determine the number of different conditions, such as erectile dysfunction and low sex drive. It can also be used to determine the cause of a partner’s infertility. A low test result in testosterone can also point to problems with the pituitary gland or hypothalamus, which control the production of the hormone.