Testing Guides
Plain-language RequestALabTest guides to frequently ordered panels.
Allergy Panel Testing: What It Measures and How to Understand Results
A factual guide to allergy panel testing, including what an allergy panel measures, how IgE and skin tests differ, how results are interpreted, and when testing may be appropriate.
Read guideAutoimmune and ANA Testing: What the Antinuclear Antibody Test Means
Learn how antinuclear antibody (ANA) testing is used in the evaluation of autoimmune conditions, what a positive or negative result can mean, and how to interpret ANA results with your clinician.
Read guideBlood Tests: A Practical Guide to Purpose, Preparation, and Results
Learn how blood tests work, what they can reveal, how to prepare, and how to read your lab results with context from authoritative health sources.
Read guideCBC and Anemia: How a Complete Blood Count Helps Evaluate Low Red Blood Cells
Learn how a complete blood count (CBC) is used to evaluate anemia, what red blood cell indices like MCV and RDW mean, and what to expect from testing.
Read guideCardiac Markers: A Guide to Laboratory Testing for Heart Injury
Learn what cardiac markers are, which tests are used to evaluate heart muscle injury, how results are interpreted, and what to expect during testing.
Read guideDrug Testing: How Laboratory Screens and Confirmatory Tests Work
Learn how laboratory drug testing works, including specimen types, screening versus confirmation, detection windows, and how to interpret results.
Read guideGlucose and A1C Testing: What Your Numbers Mean
Learn how glucose and A1C tests differ, what the results mean, and how to prepare for accurate blood sugar testing.
Read guideHormone Panel Testing: A Complete Guide to What It Measures and Why It Matters
A factual guide to hormone panel testing, covering the hormones commonly measured, reasons a clinician might order one, how results are interpreted, and factors that can affect accuracy.
Read guideInflammation and ESR: A Guide to Laboratory Testing
Learn how inflammation is measured in the lab, what the erythrocyte sedimentation rate (ESR) shows, and how to interpret results in context.
Read guideIron and Anemia: A Guide to Laboratory Testing
Learn how iron relates to anemia and which laboratory tests help evaluate iron status, including CBC, ferritin, iron, TIBC, and transferrin saturation.
Read guideKidney Function Lab Tests: BUN, Creatinine, and eGFR Explained
Learn how kidney function is assessed with common lab tests, including BUN, creatinine, and eGFR, and what factors can affect their results.
Read guideLipid Panel: What It Measures and How to Understand Your Results
A lipid panel is a blood test that measures cholesterol and triglycerides. Learn what each value means, how testing works, and how results are interpreted.
Read guideLiver Function Testing: A Complete Guide to ALT, Bilirubin, and Related Lab Tests
Learn how liver function lab tests such as ALT, AST, ALP, bilirubin, and albumin are used to assess liver health, what the results can mean, and when testing may be appropriate.
Read guideMetabolic Panel: What This Common Blood Test Measures
A metabolic panel is a routine blood test that measures glucose, electrolytes, kidney function, and liver enzymes. Learn what each marker means and how results are interpreted.
Read guideSTD Panel Testing: What Tests Are Included and How to Understand Results
Learn what an STD panel is, which infections it commonly screens for, how sample collection works, and how to interpret your results.
Read guideThyroid Panel: What the Tests Measure and How to Read Results
A factual guide to thyroid panel testing, including which hormones and antibodies are measured, why a panel may be ordered, how results are interpreted, and what can affect accuracy.
Read guideTumor Markers: What Lab Tests Can and Cannot Tell You
Learn what tumor markers are, how they are measured in blood and other samples, what they can and cannot reveal about cancer, and how to interpret results with your clinician.
Read guideVitamin Panel Testing: What It Measures and How to Understand Results
Learn what a vitamin panel measures, why a clinician might order one, how to prepare, and how to interpret results from authoritative sources.
Read guideReady to get tested? Compare markers, check any fasting guidance, then secure the panel via the RequestALabTest partner at your convenience.
Order TestsReviewed by the RequestALabTest Editorial Team
Each laboratory panel is reviewed by the RequestALabTest editorial desk against authoritative reference data.