Skip to content
Missed Black Friday? Check out our HUGE offers for Christmas!
Missed Black Friday? Check out our HUGE offers for Christmas!

Testosterone - description and reference ranges

What is it?

Testosterone is the primary sex hormone and an anabolic steroid in men. It plays a key role in the development of male reproductive tissues such as penis, testes and prostate, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body/facial hair, as well as being responsible for sperm production and sex drive.

In women, testosterone is produced in the ovaries and adrenal gland. It is one of several male sex hormones in females. Testosterone affects ovarian processes and bone strengh, and needs to be balanced with estrogen and other androgens, for the reproductive system to work normally.

Reference ranges

Quick test finder

Quick test finder

Find what you need in under 30 seconds with our (very clever!) test finder. We offer a huge range of markers all a few clicks away, as well as fastest turnaround times.

Find your test

You might also like to read

  • The PSA Blood Test and Prostate Cancer Screening
    Adam Staten

    The PSA Blood Test and Prostate Cancer Screening

    In the UK, we screen for many different conditions. This starts before we are even born when foetuses are screened for conditions such as Down’s syndrome then, in the new born period, babies are screened for metabolic diseases and hearing problems, school children are screened for colour blindness, and in adulthood we are screened for breast cancer, cervical cancer, and bowel cancer. But we don’t screen for prostate cancer despite the existence of a simple blood test that can alert us to the possibility of the disease.

    Why not?

    Read now
  • Dr Mike Forsythe on Vitamin B12
    Dr Mike Forsythe

    Dr Mike Forsythe on Vitamin B12

    Vitamin B12, also known as cobalamin, is a unique nutrient, as it’s the only vitamin we require that must be sourced externally from animal-derived foods or supplements. So how do we know if we are getting enough of it? What...

    Read now