A hormone panel is a list of numbers that only becomes useful when you understand what each marker represents and how they fit together. This guide explains the standard markers in a male hormone assessment — what each one reflects and why a clinician orders it. It deliberately gives no reference numbers, because those are lab-specific. Educational information only, not medical advice.
The total amount of testosterone circulating in the blood. Most of it is bound to proteins; a smaller fraction is free. Total testosterone is the starting point of any male hormone assessment, best measured in the morning when levels are highest.
A protein that binds a large share of testosterone, holding it inactive. High SHBG means more testosterone is bound and less is available; low SHBG does the opposite. SHBG changes with age, weight, liver function and certain medications, which is why a "normal" total testosterone can still mean low available testosterone when SHBG is high.
Free testosterone is the fraction not bound to proteins and therefore biologically active. It is often calculated from total testosterone, SHBG and albumin rather than measured directly. When symptoms and total testosterone disagree, free testosterone often explains why.
These pituitary hormones drive the testes. Their pattern distinguishes the two main categories of low testosterone:
This distinction changes the workup and treatment approach, which is why these two markers matter.
The proportion of blood made up of red cells. It rises under testosterone's influence and is monitored because a high hematocrit thickens the blood and raises clotting risk. It matters before treatment and throughout it.
A protein produced by the prostate. A baseline before treatment and periodic checks during it help flag prostate changes early. A rising PSA prompts further evaluation.
Testosterone is partly converted to estradiol. Both high and low estradiol produce symptoms — from breast tenderness and mood changes to effects on bone and sexual function — so it is checked to keep the balance sensible.
Cholesterol, triglycerides and glucose give the cardiovascular and metabolic context. Hormonal symptoms frequently overlap with metabolic problems such as obesity and insulin resistance, which are themselves common, reversible contributors to low testosterone.
Thyroid-stimulating hormone, and sometimes free thyroxine, are checked because thyroid disease mimics the symptoms of androgen deficiency almost exactly — fatigue, low mood, low libido, weight change. A thyroid problem should be found and treated on its own terms (see the thyroid guide).
Educational information only — not medical advice. Reference ranges are lab-specific and results must be interpreted in context by a clinician.