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Understand what you measure

Make sense of biomarkers, tests and health trends

Understand laboratory results, wearable signals, screening notifications, reference ranges and changes over time without treating one number as a diagnosis.

66 published guidesBrowse the complete library

LongevityMate educational library for tests, biomarkers and health tracking

Tests, Biomarkers & Tracking

Published guides

Tests, Biomarkers & Tracking

66 results

In-depth guideBlood tests and biomarkers.24-Hour Urine Protein: Test & ResultsUnderstand total protein in a 24-hour urine collection, how it differs from albumin and UACR, collection errors and what high results can mean.Updated 31 Aug 202614 minute read

In-depth guideBlood tests and biomarkers.Methylmalonic Acid (MMA) TestUnderstand methylmalonic acid as a vitamin B12 marker. See why kidney function, specimen type, laboratory ranges and recent supplements matter.Updated 13 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Urine pH: What Acidity Can and Cannot Tell YouLearn what a urine pH result describes, why a dipstick can differ from a meter, and why one reading cannot identify a kidney stone, infection or blood acidity.Updated 26 Sept 20267 minute read

In-depth guideBlood tests and biomarkers.Urine Specific Gravity: What Concentration MeansUnderstand what urine specific gravity measures, why dipstick and laboratory methods differ, and why one result cannot diagnose dehydration or kidney disease.Updated 26 Sept 20267 minute read

In-depth guideBlood tests and biomarkers.11-Deoxycortisol (Compound S): Test, Range & MeaningUnderstand what an 11-deoxycortisol blood test measures, why baseline, ACTH and metyrapone results differ, and how to interpret the result safely.Updated 24 Aug 202611 minute read

In-depth guideBlood tests and biomarkers.Creatine Kinase (CK) Blood TestUnderstand a creatine kinase blood result, why exercise and timing matter, and how CK differs from creatinine. Read laboratory ranges with the right context.Updated 10 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Erythropoietin (EPO) Blood Test: Meaning and LimitsUnderstand how an EPO blood result relates to red blood cells, kidney signalling and oxygen, and why a standalone value cannot explain anemia.Updated 27 Sept 20266 minute read

In-depth guideBlood tests and biomarkers.Globulin Blood Test: High, Low and A/G RatioLearn what a globulin blood test measures, how calculated globulin and the A/G ratio differ, and how to read high or low results in context.Updated 4 Sept 202613 minute read

In-depth guideBlood tests and biomarkers.Antinuclear Antibody (ANA) Test: Meaning, Patterns and LimitsA plain-English guide to antinuclear antibody testing, including titre, pattern, HEp-2 IFA, other assays, healthy positives and why the result needs clinical context.Updated 5 Sept 202612 minute read

In-depth guideBlood tests and biomarkers.aPTT (PTT) Blood TestLearn what aPTT measures, why a prolonged clotting time does not always mean bleeding risk, and how medicines and sample quality affect the result.Updated 11 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Vitamin B6 (PLP) Blood TestUnderstand plasma PLP testing, preparation and supplement effects. See why laboratory intervals vary and a high B6 result does not alone diagnose nerve injury.Updated 21 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.H. pylori Stool Antigen Test: Results and TimingUnderstand H. pylori stool antigen results, the difference from breath, PCR and antibody tests, and why medicines and test-of-cure timing matter.Updated 30 Sept 20266 minute read

In-depth guideBlood tests and biomarkers.Mean Platelet Volume (MPV) Blood TestUnderstand mean platelet volume alongside platelet count. Learn why laboratory methods and sample timing matter, and why MPV alone cannot diagnose a cause.Updated 12 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Transferrin Blood Test: Iron Transport and Result ContextLearn what measured transferrin means, how it differs from ferritin and transferrin saturation, and why inflammation and laboratory units matter.Updated 8 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Uric Acid Blood Test: High Results, Gout and MeaningUnderstand a uric acid blood test, high and low results, gout treatment targets, kidney excretion, urine testing and questions for your clinician.Updated 4 Sept 202613 minute read

In-depth guideBlood tests and biomarkers.Eosinophils: Absolute Count and PercentageUnderstand eosinophil counts and percentages, convert common units, and learn why the full blood count, symptoms, medicines and laboratory range matter.Updated 8 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Total Protein Blood Test: High, Low and A/G ContextLearn what a total protein blood test measures, how albumin and globulin shape A/G context, and how to read high or low results safely.Updated 4 Sept 202613 minute read

In-depth guideBlood tests and biomarkers.UACR Test: Urine Albumin-Creatinine Ratio ExplainedUnderstand what a UACR urine test measures, the A1 to A3 categories, why repeat testing matters, and how UACR works with eGFR to assess kidney health.Updated 27 Aug 202614 minute read

In-depth guideBlood tests and biomarkers.24-Hour Urine Creatinine: Test & ResultsUnderstand a 24-hour urine creatinine result, collection accuracy, units, creatinine clearance and why muscle mass and kidney context matter.Updated 31 Aug 202613 minute read

In-depth guideBlood tests and biomarkers.BUN Blood Test: High, Low & Kidney ContextUnderstand blood urea nitrogen (BUN), why hydration and protein affect it, and how creatinine, eGFR, urine albumin and trends clarify a result.Updated 29 Aug 202614 minute read

In-depth guideBlood tests and biomarkers.BUN/Creatinine Ratio: What the Blood Test AddsUnderstand how blood urea nitrogen and creatinine form a ratio, what can shift either value, and why eGFR and the full kidney assessment matter.Updated 25 Sept 20267 minute read

In-depth guideBlood tests and biomarkers.ESR Blood Test: High, Low and What Results MeanLearn what an erythrocyte sedimentation rate (ESR) measures, how Westergren and alternate methods differ, and why age, sex, pregnancy and anaemia matter.Updated 3 Sept 202614 minute read

In-depth guideBlood tests and biomarkers.Free T3 (FT3) Blood TestUnderstand free T3 alongside TSH and free T4. Learn why assay methods, illness and biotin matter, and why FT3 is not a personal metabolism target.Updated 11 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.IgM Blood Test: Total Immunoglobulin M ExplainedUnderstand total IgM, high and low results, laboratory ranges and units, and how this blood test differs from infection-specific IgM antibodies.Updated 1 Oct 20264 minute read

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