Lab Testing & Biomarkers: Hormone Panels, Metabolic Labs & Optimal Ranges

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• Hormone Testing: Which Labs to Order and What They Mean

  Which hormones to test, when to draw blood, and how to interpret results.

• Biological Age Test

  Biological age tests compared: epigenetic clocks, blood-biomarker calculators, and fitness proxies.

• How to Test for Insulin Resistance: Labs That Matter

  Fasting insulin, HOMA-IR, and triglyceride-to-HDL ratio.

• Fasting Insulin Levels: What's Optimal and Why It Matters

  Optimal <7 μIU/mL vs standard 'normal' <25 — why the gap matters.

• Free Testosterone Levels: Ranges by Age and What's Optimal

  Age-adjusted ranges and why free T matters more than total.

• SHBG (Sex Hormone Binding Globulin): What Your Levels Mean

  How SHBG affects bioavailable testosterone and estrogen.

• Testosterone Levels by Age: What's Normal and What's Optimal

  Reference ranges by decade and the difference between normal and optimal.

• What Is HRV and Why Does It Matter for Recovery?

  HRV as a recovery and autonomic health marker.

• DEXA Scan: What It Measures, What It Costs, and How to Read Your Results

  DEXA scan: what it measures, cost, preparation, and how to read results.

• Bone Density T-score and Z-score: Charts by Age and What Your Numbers Mean

  Bone density T-score and Z-score charts by age — what your numbers mean.

• How to Read Blood Test Results: the Complete Guide to Understanding Your Lab Work

  How to read your blood work — a plain-English guide to every common lab value.

• CBC Blood Test: What a Complete Blood Count Measures and What Your Results Mean

  CBC explained: RBC, WBC, hemoglobin, hematocrit, platelets, and differentials.

• MCHC Blood Test: Meaning, Normal Range, High and Low Results

  MCHC explained: hemoglobin concentration in red blood cells, high/low causes, and next labs.

• MCV Blood Test: High, Low, Normal Range, and Anemia Patterns

  MCV explained: red blood cell size, microcytic vs macrocytic anemia patterns.

• HCT Blood Test: Hematocrit Levels, High and Low Results Explained

  Hematocrit explained: high and low HCT, dehydration, anemia, sleep apnea, and TRT monitoring.

• Comprehensive Metabolic Panel (CMP): All 14 Tests Explained with Normal Ranges

  CMP: 14 tests covering glucose, electrolytes, kidney, liver, and protein.

• Liver Function Tests: ALT, AST, ALP, and Bilirubin Results Explained

  Liver panel: ALT, AST, ALP, bilirubin — patterns and what elevations mean.

• Kidney Function Tests: eGFR, Creatinine, BUN, and CKD Stages Explained

  Kidney function: eGFR, creatinine, BUN, and the 2024 KDIGO CKD stages.

• Thyroid Blood Test: TSH, Free T4, T3 Results and What They Mean

  Thyroid labs: TSH, free T4, T3 — what your results mean and when to retest.

• Luteinizing Hormone Test: LH Levels, Fertility, Menopause, and Low Testosterone

  LH levels explained for ovulation, menopause, fertility, and male testosterone signaling.

• A1C Test: Levels Chart, What's Normal vs Prediabetes, and How to Lower It

  A1C test: levels chart, prediabetes range, and evidence-based ways to lower it.

• CRP and hs-CRP Blood Test: Inflammation Levels, Cardiovascular Risk, and What's Normal

  CRP / hs-CRP: inflammation marker, cardiovascular risk tiers, and what to do.

• Iron Blood Test: Ferritin, TIBC, and Iron Saturation Explained

  Iron panel: ferritin, TIBC, saturation — diagnosing deficiency and overload.

• Vitamin D Blood Test: Optimal Levels, Deficiency Symptoms, and Updated Guidelines

  Vitamin D levels: the 2024 Endocrine Society guidelines and what to supplement.

• Vitamin D vs D3: Absorption Differences, Which Is Better, Dosing, and When to Test

  Vitamin D vs D3: absorption differences, which is better, dosing, and when to test.

• Vitamin D and K2: Why to Pair Them, Dosing, and the Role of Magnesium

  Vitamin D and K2: why to pair them, the calcium-partitioning rationale, dosing, and magnesium.

• Dexamethasone Suppression Test: Low-dose vs High-dose Protocols and Reading Results

  Dexamethasone suppression test: low-dose vs high-dose protocols, reading results, and why false positives are common.

• TIBC Blood Test: Total Iron Binding Capacity, Transferrin Saturation, and Iron Panel Interpretation

  TIBC blood test: total iron binding capacity, transferrin saturation, and iron panel interpretation.

• Thyroid Antibody Test: TPO and Thyroglobulin Antibodies, Normal Ranges, and Hashimoto's Connection

  Thyroid antibody test: TPO and thyroglobulin antibodies, normal ranges, and Hashimoto's connection.

• MPV Blood Test: What Mean Platelet Volume Means When It's High or Low

  MPV: what mean platelet volume reveals about platelet production and disease.

• White Blood Cell Count: Normal Range, Low and High WBC Causes

  White blood cell count: normal range, causes of high and low WBC.

• DEXA Scan vs InBody: Clinical Gold Standard vs BIA — Accuracy, Bone Density, and When Each Is Worth It

  DEXA scan vs InBody: clinical gold standard vs BIA — accuracy, bone density, and when each is worth it.

• At Home Hormone Testing

  At-home hormone testing: DUTCH, ZRT, and saliva vs blood vs urine accuracy.

• When to Test Hormones in Cycle

  Which cycle day to test which hormone, and why birth control/HRT confound results.

• Hormone Testing Cost

  Hormone testing cost: panel prices, insurance coverage, and self-pay options.

• Fasting Insulin vs A1C: Which Test Catches Insulin Resistance Earlier

  Fasting insulin vs A1C: why fasting insulin can flag insulin resistance years before A1C moves.

• Low MCV: What It Means When Hemoglobin Is Still Normal

  Low MCV with normal hemoglobin: early iron deficiency vs thalassemia trait, and how to tell them apart.

• Biomarker Testing Services Compared: Function Health, Hone Health, Superpower, and What They Actually Test

  Biomarker testing services compared: Function Health, Hone Health, Superpower, and what they actually test.

• Disease-screening Biomarkers: Cancer, Cardiac, and Other Clinical Biomarker Categories Explained

  Disease-screening biomarkers: cancer, cardiac, and other clinical biomarker categories explained.