Hormone Testing Guide: Which Tests to Get and When
A complete guide to ordering and interpreting hormone lab panels
Comprehensive hormone testing goes far beyond what standard annual checkups include. This guide covers which hormones to test, when to test them (timing matters enormously), how to prepare, and how to interpret results using functional optimal ranges.
Most standard medical panels test only TSH (thyroid) and maybe total testosterone (if you ask). This minimal approach misses the majority of hormonal dysfunction: subclinical thyroid disease, free testosterone deficiency masked by normal total T, cortisol rhythm disruption, estrogen-progesterone imbalance, and adrenal dysfunction.
Comprehensive hormone testing requires understanding three critical factors: what to test (the right markers), when to test (timing dramatically affects results), and how to interpret results (functional optimal ranges vs. standard reference ranges). Getting all three right is the difference between identifying a treatable hormonal issue and being told 'your labs are normal.'
The Complete Hormone Panel
| Category | Tests | Why It's Needed |
|---|---|---|
| Thyroid | TSH, Free T3, Free T4, Reverse T3, TPO Ab, Tg Ab | TSH alone misses 30% of thyroid dysfunction |
| Sex Hormones (Male) | Total T, Free T, SHBG, Estradiol (sensitive), LH, FSH, DHEA-S, Prolactin | Free T and SHBG essential; total T alone is insufficient |
| Sex Hormones (Female) | Estradiol, Progesterone, Total T, Free T, SHBG, DHEA-S, LH, FSH, AMH | Cycle timing critical; perimenopause requires specific markers |
| Adrenal | AM Cortisol (or 4-pt salivary), DHEA-S | Cortisol rhythm affects all other hormones |
| Metabolic | Fasting insulin, HOMA-IR, HbA1c, fasting glucose | Insulin resistance drives hormonal imbalance |
| Supportive | Vitamin D, ferritin, B12, magnesium (RBC), zinc | Nutrient cofactors required for hormone synthesis |
When to Test: Timing Matters
Blood draw timing:
- Morning (7-9 AM): Required for testosterone (peaks in early morning; afternoon levels are 20-40% lower) and cortisol (follows diurnal rhythm)
- Fasting (12 hours): Required for insulin, glucose, and lipids
- Consistent timing: If retesting, always test at the same time of day for valid comparison
Menstrual cycle timing (women):
- Day 3 (early follicular): FSH, LH, estradiol — assess ovarian reserve
- Day 19-21 (mid-luteal): Progesterone — confirms ovulation (should be >10 ng/mL)
- Any day: TSH, Free T3/T4, DHEA-S, fasting insulin, testosterone, SHBG
Perimenopausal women: Hormones fluctuate significantly; testing on day 3 (if still cycling) or random testing (if irregular) with clinical correlation. AMH is a more stable marker of ovarian reserve.
How to Prepare for Hormone Testing
- 12-hour overnight fast (water and black coffee are okay)
- Arrive by 8-9 AM for morning cortisol and testosterone accuracy
- No intense exercise for 24 hours before testing (transiently affects cortisol, testosterone, and inflammation markers)
- Avoid biotin supplements for 48-72 hours before testing (biotin interferes with immunoassays and can falsely elevate or suppress thyroid and hormone values — an underrecognized issue that causes misdiagnosis)
- Note all medications — oral contraceptives increase SHBG and CBG, affecting total testosterone and cortisol interpretation; statins may lower testosterone; PPIs affect B12 and magnesium
- Sleep normally the night before — sleep deprivation acutely lowers testosterone and raises cortisol
- Minimize stress on the day of testing — acute anxiety raises cortisol by 20-50%
Interpreting Results: Standard vs. Optimal Ranges
Lab reference ranges represent the middle 95% of the tested population — which includes many unhealthy individuals. Functional optimal ranges are based on the levels associated with minimal symptoms and disease risk:
| Marker | Standard Range | Functional Optimal |
|---|---|---|
| TSH | 0.45-4.5 mIU/L | 0.5-2.0 mIU/L |
| Free T3 | 2.0-4.4 pg/mL | 3.0-4.0 pg/mL |
| Total Testosterone (male) | 264-916 ng/dL | 500-900 ng/dL |
| Free Testosterone (male) | 35-155 pg/mL | 100-150 pg/mL |
| Fasting Insulin | 2.6-24.9 μIU/mL | <7 μIU/mL |
| Vitamin D | 30-100 ng/mL | 50-80 ng/mL |
| Ferritin | 12-300 ng/mL (M) / 12-150 (F) | 50-150 ng/mL |
When your results fall in the 'normal' range but below 'optimal,' you may have symptoms that a standard interpretation would dismiss. This is the functional medicine approach to lab interpretation — and why we use tighter ranges based on clinical outcomes research.
Frequently Asked Questions
How much does comprehensive hormone testing cost?
Individual hormone tests range from $30-100 each. A comprehensive panel (15-25 markers) through our service is $499, including interpretation. Many tests are covered by insurance with appropriate CPT codes and diagnostic codes — request your doctor order them, or use a direct-to-consumer lab service. HSA/FSA funds are eligible for all lab testing.
Can I test hormones at home?
Salivary cortisol (4-point), salivary sex hormones, and dried blood spot tests can be collected at home. These are convenient and accurate for certain markers. However, serum (blood draw) testing remains the gold standard for most hormones — particularly testosterone, thyroid, and insulin. At-home collection kits with dried blood spots are improving in accuracy but may not be validated for all markers.
How often should I retest hormones?
Retest 8-12 weeks after starting any new intervention (medication, supplement, or lifestyle change) — this is enough time for most hormones to reach a new steady state. Once stable and optimized, retest every 6 months for the first year, then annually. More frequent testing may be needed for: thyroid medication dose adjustments (6-8 weeks), TRT monitoring (quarterly in the first year), and menstrual cycle-timed testing.
Why does my doctor only test TSH?
Standard practice guidelines (AACE, ATA) recommend TSH as a first-line screening test for thyroid disease. A comprehensive panel is typically ordered only when TSH is abnormal or symptoms persist. However, TSH-only screening misses T4-to-T3 conversion problems, early Hashimoto's (elevated antibodies before TSH rises), and cases where TSH is 'normal' but suboptimal. Advocating for a full panel — or ordering one independently — provides a much more complete picture.
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← Back to Testing & Biomarkers
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