Testosterone therapy (TRT) is a medical treatment that belongs under a doctor's supervision, not something to start on your own. Before a doctor considers TRT, a number of blood values are often looked at first, such as your testosterone, free testosterone, LH and FSH. A blood test here is a starting point for the conversation, not a prescription.
Important to say upfront: this article is informational. The decision whether to start is one you make together with a doctor.
Why measure first?
A low testosterone must first be confirmed, preferably with a morning reading that is repeated, because the value varies from day to day. That includes assessing symptoms and values together. In research, a low testosterone with symptoms was defined as late-onset hypogonadism (Wu, 2010).
Which values often come into view?
Besides testosterone and free testosterone, a doctor often looks at SHBG, LH, FSH and oestradiol. Your haematocrit and your PSA are also often taken as baseline values. What fits is judged by your doctor.
What does this mean for you?
If you have complaints that can fit a low testosterone, a morning reading and a conversation with your GP is a logical first step. See also burnout or low testosterone and the pillar male hormonal health. For what comes next, see monitoring testosterone therapy.
Getting started
The Testosterone Panel maps your testosterone, free testosterone and SHBG as a starting point for the conversation with your doctor.
References
- Wu FCW, et al. Identification of late-onset hypogonadism in middle-aged and elderly men. N Engl J Med. 2010;363(2):123-135. doi:10.1056/NEJMoa0911101.
- Harman SM, et al. Longitudinal effects of aging on serum total and free testosterone levels. J Clin Endocrinol Metab. 2001;86(2):724-731. PMID: 11158037.
- NHG-Standaard (male hormone complaints, biology and diagnostics). Dutch College of General Practitioners.
Disclaimer
Caliberhealth works with BIG-registered doctors who assess your blood results. This article gives general information and is not a substitute for medical advice from a GP or specialist. A treatment such as TRT belongs under a doctor's supervision. A blood test is a tool, not a diagnosis in itself. For serious symptoms, contact your GP, or in an emergency call 112.
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