Testing Guides
Background reading from DiagnosticTest to help you ask better questions.
Allergy Panel Testing: What It Measures and When It Is Used
An allergy panel is a group of laboratory tests that detect allergen-specific IgE antibodies in blood. Learn what panels measure, how results are interpreted, and their limits.
Read guideAutoimmune and ANA Testing: What the Antinuclear Antibody Test Means
Learn how the antinuclear antibody (ANA) test is used in evaluating autoimmune conditions, what a positive or negative result can mean, and why ANA results must be interpreted alongside symptoms and other findings.
Read guideBlood Test Basics: A Practical Guide to Laboratory Testing
Learn how blood tests work, what they can reveal, how to prepare, and how to read your lab results with clear, evidence-based guidance.
Read guideCBC and Anemia: How Complete Blood Count Results Are Used to Evaluate Low Hemoglobin
Learn how a complete blood count (CBC) is used to evaluate anemia, including hemoglobin, hematocrit, MCV, RDW, and reticulocyte findings and what they can mean.
Read guideCardiac Markers: What Lab Tests Reveal About Heart Muscle
Learn what cardiac markers are, which blood tests measure heart muscle injury, how troponin and other markers are used, and what results can mean.
Read guideDrug Testing: How Laboratory Tests Detect Drugs and Interpret Results
Learn how laboratory drug testing works, including specimen types, detection windows, screening versus confirmation methods, and how results are interpreted.
Read guideGlucose and A1C Testing: How Blood Sugar Markers Work Together
Learn how glucose and A1C tests differ, what each measures, how results are interpreted, and why clinicians often use them together to assess blood sugar over time.
Read guideHormone Panel Testing: What It Measures and How to Interpret Results
Learn what a hormone panel tests, which hormones are commonly included, how results are interpreted, and what factors can affect hormone blood test accuracy.
Read guideInflammation and ESR: A Guide to Laboratory Testing
Learn how laboratory tests, including the erythrocyte sedimentation rate (ESR), help evaluate inflammation and what results can mean.
Read guideIron and Anemia: How Laboratory Tests Help Identify and Classify Iron Disorders
Learn how iron, ferritin, transferrin saturation, and related laboratory tests are used to evaluate anemia and distinguish iron deficiency from other causes of low hemoglobin.
Read guideKidney Function Tests: Understanding BUN, Creatinine, and eGFR
Learn how kidney function is assessed with laboratory tests such as BUN, serum creatinine, and eGFR, what the results can indicate, and when testing may be appropriate.
Read guideLipid Panel: What This Heart Health Blood Test Measures
A lipid panel is a routine blood test that measures cholesterol and triglycerides to help estimate cardiovascular risk. Learn what each result means and how testing works.
Read guideLiver Function Testing: A Guide to Common Lab Tests
Learn how liver function lab tests work, what markers like ALT, AST, ALP, bilirubin, and albumin measure, and how doctors interpret results.
Read guideMetabolic Panel: What It Tests, Results, and How to Prepare
Learn what a metabolic panel measures, including the basic and comprehensive versions, how to prepare, and how to interpret results.
Read guideSTD Panel Testing: What It Screens For and How to Understand Results
Learn what an STD panel is, which infections it can screen for, how sample collection works, and how to interpret positive or negative results.
Read guideThyroid Panel Testing: What the Tests Measure and How to Read Results
Learn what a thyroid panel measures, which tests it includes, how results are interpreted, and when testing is useful.
Read guideTumor Markers: What Laboratory Tests Can and Cannot Tell You
Learn what tumor markers are, how they are measured in blood and other body fluids, what conditions they may be associated with, and the limits of their use in cancer care.
Read guideVitamin Panel Testing: What It Measures and When It Is Used
Learn what a vitamin panel measures, why a clinician might order one, how results are interpreted, and what to know before testing.
Read guideReady to get tested? Study what the panel measures, note the preparation rules, and purchase through the DiagnosticTest partner when prepared.
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