This is not medical advice. It is a description of what current clinical guidelines and the endocrine research literature suggest constitutes a useful hormonal baseline for men experiencing symptoms consistent with hormonal change.
Two early-morning total testosterone measurements. A single measurement is considered insufficient for clinical decision-making. Repeat testing on a separate morning, drawn between 7 and 10am, provides more reliable data.4
Free testosterone and SHBG. To understand what your body actually has access to, not just what's circulating in total.3
LH and FSH. These pituitary hormones help distinguish between primary hypogonadism — where the testes themselves are underproducing — and secondary hypogonadism, where the signal from the brain is insufficient. The distinction matters for understanding what is happening and why.4
CBC and hematocrit. Standard markers that provide metabolic context.5
A sleep evaluation if symptoms warrant. Obstructive sleep apnea is significantly more prevalent in midlife men and is independently associated with testosterone suppression. If you are experiencing unexplained fatigue, brain fog, or non-restorative sleep, sleep screening is worth raising directly with your physician — it is a legitimate and important diagnostic step.4
The goal of this workup is not to walk into your physician's office with a conclusion. It is to walk in with data and questions. There is a significant difference between the two.