marker glossary
27 articles in this field-note collection.
Lab Markers That Move Together: How to Read Related Results Safely
Related lab results add context without proving a diagnosis. Learn how to compare lipid, glucose, thyroid, iron, and liver tests without overreading patterns.
Albumin Blood Test: What a High or Low Result Can—and Cannot—Tell You
An albumin blood test is a nonspecific result, not a liver, nutrition, or longevity score. Learn what to preserve and what to ask about next.
ALP Blood Test: What a High or Low Result Can—and Cannot—Tell You
An ALP blood test can reflect liver, bile-duct, bone, or life-stage context. Learn what to preserve, what follow-up may involve, and what it cannot diagnose.
ALT Blood Test: What a High Result Can—and Cannot—Tell You
ALT is a nonspecific liver-injury marker, not a diagnosis or severity score. Learn how to preserve the report context and ask what happens next.
ApoB Blood Test: How to Read Your Result
Learn what an ApoB blood test measures, when it adds context beyond LDL cholesterol, how current guidelines use it, and how to track results safely.
AST Blood Test: What a High Result Can—and Cannot—Tell You
An AST blood test can reflect liver or non-liver cell injury. Learn why the source report, related results, and clinical context matter more than a ratio.
Common Blood Test Markers Glossary: CBC, CMP, Lipids, Thyroid, and More
Find common CBC, CMP, lipid, glucose, thyroid, iron, inflammation, vitamin, and hormone markers—plus the report details needed to review them.
DHEA-S Blood Test: How to Read a High or Low Result
A DHEA-S blood test reflects an adrenal androgen. Learn why age, sex, assay, the source report, symptoms, and related tests shape a safe review.
eGFR and Creatinine: What the Numbers Can—and Cannot—Show
Learn how serum creatinine becomes an eGFR estimate, why equation, chronicity, urine albumin, and source-report context matter before interpreting a result.
Estradiol (E2) Blood Test: How to Review the Result
An estradiol (E2) result needs its analyte, specimen, unit, assay, timing, therapy context, and clinical question before a range or trend can be reviewed.
Fasting Glucose: How to Read a Lab Result Without Losing Context
Fasting plasma glucose is a time-specific lab result. Learn how fasting status, specimen, confirmation, A1C, and source-report context shape a safe review.
Ferritin Blood Test: Low, High, and Normal Results
Learn what a ferritin blood test measures, why low and high results mean different things, and which context and related tests help clinicians read it.
Free T3 Blood Test: What the Result Can—and Cannot—Show
A Free T3 result needs its analyte, specimen, unit, assay, source range, illness, medicines, and full clinical question attached before review.
Free T4 Blood Test: What the Result Does and Does Not Show
A Free T4 result needs its analyte, specimen, unit, assay, report interval, TSH, illness, pregnancy, and therapy context before clinical review.
HbA1c: What the Result Measures—and What Can Distort It
Learn what HbA1c measures, how 2026 screening and diagnostic criteria differ from personal goals, and why assay, blood-cell, and glucose context matter.
HDL Cholesterol Blood Test: Beyond ‘Good Cholesterol’
An HDL-C result measures cholesterol carried in HDL—not particle number or function. Review it with LDL-C, non-HDL-C, ApoB, triglycerides, and context.
Homocysteine Results: Context, Causes, and Limits
A homocysteine result needs its total-analyte identity, specimen handling, source interval, possible contributors, purpose, and outcome limits.
hs-CRP Blood Test: Context, Cardiovascular Risk, and Next Steps
Learn what an hs-CRP result measures, how it differs from standard CRP, where current cardiovascular guidance applies, and what context to preserve.
LDL Cholesterol Results: Calculation, Context, and Comparability
An LDL-C result needs its calculation or assay, unit, source interval, triglycerides, companion lipids, risk context, and treatment status attached.
Lipoprotein(a) [Lp(a)] Test: Units, Risk, and Next Steps
Learn what an Lp(a) result measures, why mg/dL and nmol/L have no reliable fixed conversion, how U.S. guidance frames risk, and what context to keep.
Omega-3 Index Results: What the Percentage Means
An Omega-3 Index result needs its erythrocyte EPA+DHA identity, percentage denominator, method, source range, exposure context, and clinical question.
RDW Blood Test: RDW-CV, RDW-SD, and What the Result Means
RDW measures variation in red-cell volume. Learn RDW-CV versus RDW-SD, why the full CBC and source range matter, and what the result cannot diagnose.
Testosterone Blood Test: Total, Free, Timing, and Context
A testosterone blood test needs the exact analyte, method, timing, range, symptoms, medicines, hormone context, and source report—not a web target.
Triglyceride Results: Fasting, Context, and Risk
A triglyceride result needs its fasting status, unit, source interval, complete lipid panel, possible contributors, risk context, and review plan attached.
TSH Blood Test: What the Result Can—and Cannot—Show
A TSH result needs its exact analyte, specimen, unit, assay, source interval, clinical purpose, life stage, illness, medicines, and thyroid context.
Vitamin B12 Results: Ranges, MMA, and Context
A vitamin B12 result needs its total-or-active assay identity, unit, source range, symptoms, blood count, companion markers, and exposure context.
Vitamin D Blood Test: How to Read 25(OH)D Results
A vitamin D blood test usually measures 25(OH)D. Learn test identity, units, screening guidance, evidence limits, and safer questions to ask next.