A full hormone panel is a group of blood tests read together, not one number. In practice it covers thyroid function (TSH, with free T4), the sex hormones (total and free testosterone, estradiol, and progesterone when cycle timing makes it meaningful), the pituitary signals that drive them (LH and FSH), the binding protein SHBG that decides how much hormone your tissues can actually use, a morning cortisol, and metabolic markers such as fasting glucose, insulin and A1c. A single TSH or a single testosterone draw is a data point. A panel is the map.

Why one number is not a panel

Hormones are released in pulses and follow a daily rhythm. Testosterone peaks in the early morning and eating lowers it, which is why the Endocrine Society’s 2026 statement on testosterone therapy says a diagnosis of hypogonadism rests on symptoms plus at least two early morning, fasting measurements, not on one convenient afternoon draw. It is common for a first low-looking result to come back normal on a properly timed repeat. The American Urological Association takes the same position.

That principle runs through the whole panel. Timing, fasting state, cycle day and assay quality change the number more than most people expect.

Thyroid: TSH first, then the rest

The American Thyroid Association treats TSH as the first-line test, with free T4 added when TSH is abnormal. Thyroid peroxidase antibodies are worth adding when autoimmune thyroid disease is suspected, because they change the monitoring plan even while TSH still looks normal.

Here is a limitation worth stating plainly. Reverse T3 appears on many panels sold direct to consumers. The American Thyroid Association’s review of the evidence does not support routine reverse T3 measurement in the care of hypothyroidism or hyperthyroidism. A raised reverse T3 is not, on its own, a reason to start thyroid hormone.

Men: total testosterone is only the opening question

A panel that stops at total testosterone will mislead you. A useful one adds:

  • SHBG and albumin, so free testosterone can be calculated, or free testosterone measured by equilibrium dialysis. Direct analog immunoassays for free testosterone are not accurate enough to build a diagnosis on.
  • LH and FSH, which separate a testicular problem from a pituitary or hypothalamic one. That distinction changes the treatment completely.
  • Estradiol, prolactin, ferritin and A1c, because obesity, a prolactin-secreting pituitary tumour, iron overload and untreated diabetes are reversible causes worth finding before anyone reaches for a prescription.

More on the symptom side in signs of low testosterone.

Women: timing decides whether the result means anything

A women’s panel typically includes estradiol, progesterone, FSH, LH, total testosterone, SHBG, DHEA-S, prolactin and thyroid function. Progesterone is only interpretable in the luteal phase, roughly a week before the expected period, in someone still cycling. Drawn at random it tells you very little.

The honest limitation here is bigger than most panels admit: FSH does not diagnose perimenopause. Levels swing week to week during the transition, so a normal FSH does not rule it out and a high one does not confirm it. ACOG describes menopause as a clinical diagnosis in women over 45, based on symptoms and menstrual pattern. Blood work is there to rule out thyroid disease, anaemia, pregnancy and other explanations, and to guide therapy in younger women. It is not what names the diagnosis. See perimenopause vs menopause.

Cortisol, DHEA-S and the adrenal question

A morning cortisol screens for genuine adrenal disease. Adrenal insufficiency is real, serious and treatable, and it has a specific diagnostic pathway.

“Adrenal fatigue” is a different matter. A systematic review in BMC Endocrine Disorders examined the studies behind the concept and found no substantiation that it exists as a medical condition, and no endocrine society recognises it. We say that out loud because the label sells a great many supplements. Fatigue alongside a normal cortisol is still real fatigue, and it usually has a findable cause: iron deficiency, thyroid disease, sleep apnoea, depression, poorly controlled glucose, or a medication. See thyroid vs adrenal.

The metabolic markers that belong on a hormone panel

Insulin is a hormone. Fasting glucose, fasting insulin and A1c, together with lipids, a complete blood count, a metabolic panel, ferritin, vitamin D and B12, explain a surprising share of the symptoms people arrive attributing to sex hormones. Insulin resistance also pushes SHBG down, which changes how testosterone and estradiol read on paper even when production is unchanged.

What a hormone panel cannot do

  • Salivary and urine hormone panels are not a substitute for serum. ACOG and the American Society for Reproductive Medicine state in their consensus on compounded bioidentical hormone therapy that salivary testing does not offer an accurate or precise assessment of hormone levels, and there are no FDA-approved salivary or urinary tests for steroid hormones.
  • A reference range is not a treatment target. Ranges describe a population, not your optimal state. A result inside the range is not a plan, and one just outside it is not automatically a disease.
  • No panel diagnoses on its own. Symptoms, examination, history and medication review carry at least as much weight as the printout.
  • Frequent repeat panels do not track progress well. In menopause care, dosing is titrated to symptom relief rather than to chasing a number.

Red flags: see a clinician, not a checkout page

  • Sudden severe headache with vision changes, or new milky nipple discharge, which can point to a pituitary problem
  • Dizziness on standing, salt craving, darkening skin, or vomiting with severe weakness, which can signal adrenal insufficiency
  • Palpitations, tremor, heat intolerance and unintended weight loss
  • Any vaginal bleeding after menopause
  • New breast tissue or shrinking testicles in men
  • Severe low mood or thoughts of self harm

Getting a panel worth the blood draw

Draw in the morning, fasted, cycle-timed where it matters, at the same lab each time. Repeat abnormal results before drawing conclusions, and bring a complete medication and supplement list, since biotin, opioids, steroids and hormonal contraception all move these numbers. Our hormone therapy service reviews panels in person in Deerfield Beach and by telehealth across Florida, in English, Portuguese and Spanish.

Medically reviewed by Krishna Borges, MSN, APRN, FNP-C. This article is for general education and is not a substitute for individual medical advice.