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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.

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LongevityMate educational library for tests, biomarkers and health tracking

Tests, Biomarkers & Tracking

Published guides

Tests, Biomarkers & Tracking

66 results

In-depth guideBlood tests and biomarkers1,25-Dihydroxy Vitamin D (Calcitriol): Test & MeaningLearn what the 1,25-dihydroxy vitamin D blood test measures, when calcitriol testing is useful, and why 25-hydroxy vitamin D checks stores instead.Updated Aug 24, 202610 minute read

In-depth guideBlood tests and biomarkersCeruloplasmin Blood Test: What the Result Can MeanLearn what ceruloplasmin measures, why copper tests are paired with it, and why one low or high result cannot diagnose a condition.Updated Sep 27, 20266 minute read

In-depth guideBlood tests and biomarkersIgG Blood Test: Total Immunoglobulin G ExplainedLearn what a total IgG blood test measures, how it differs from a germ-specific IgG test, and why low or high results need the matching laboratory range.Updated Sep 30, 20266 minute read

In-depth guideBlood tests and biomarkersLactate Dehydrogenase (LDH) Blood TestLearn what an LDH blood test can and cannot show, why a damaged sample can raise the result, and how specimen type and laboratory intervals affect interpretation.Updated Sep 10, 20265 minute read

In-depth guideBlood tests and biomarkersPotassium Blood Test: Low, High and What Results MeanLearn what a potassium blood test measures, how to read low or high results, and why the report range, unit, specimen, method and surrounding tests matter.Updated Sep 4, 202614 minute read

In-depth guideBlood tests and biomarkersTransferrin Saturation: Formula, Low & High ResultsUnderstand the transferrin saturation formula, why ferritin and inflammation matter, common low and high patterns, sample variation, and sensible follow-up.Updated Aug 28, 202615 minute read

In-depth guideBlood tests and biomarkersCalprotectin Stool TestUnderstand stool calprotectin as an intestinal inflammation marker, with a named laboratory example, sample guidance and clear limits on diagnosing IBD.Updated Sep 13, 20265 minute read

In-depth guideBlood tests and biomarkersImmunoglobulin A (IgA) Blood Test: Total IgA ExplainedUnderstand total IgA, high and low results, age-specific laboratory ranges, mg/dL versus g/L, and why total IgA differs from celiac antibodies.Updated Sep 29, 20265 minute read

In-depth guideBlood tests and biomarkersAnion Gap Blood Test: Formula, High & Low ResultsUnderstand the anion gap formula, why laboratory ranges differ, what high or low results can mean, and why electrolytes, albumin and symptoms matter.Updated Aug 27, 202613 minute read

In-depth guideBlood tests and biomarkersApolipoprotein A1 (ApoA1): Test & MeaningUnderstand ApoA1, how it differs from HDL cholesterol, why a low result needs context, and how ApoB and the full lipid profile complete interpretation.Updated Aug 30, 202615 minute read

In-depth guideBlood tests and biomarkersBNP Blood Test: What BNP and NT-proBNP Can Tell YouUnderstand BNP and NT-proBNP results, why high or low values need context, and which report details matter. Evidence-led, without a diagnosis from one number.Updated Sep 24, 20267 minute read

In-depth guideBlood tests and biomarkersC-Peptide Blood Test: Meaning, Units and ContextUnderstand what a C-peptide result says about your body's own insulin production, and why glucose, timing, kidney function, medicines and the assay matter.Updated Sep 3, 202616 minute read

In-depth guideBlood tests and biomarkersRDW Blood Test: Red Cell Size Variation ExplainedLearn what RDW-CV measures, how it differs from MCV and RDW-SD, and why a high, normal or low result needs the rest of the blood count.Updated Oct 1, 20264 minute read

In-depth guideBlood tests and biomarkerstTG-IgA Blood Test: Celiac Screening and Its LimitsUnderstand tTG-IgA celiac screening, total IgA, gluten exposure, assay-specific antibody units and why one blood result does not settle the diagnosis.Updated Sep 29, 20265 minute read

In-depth guideBlood tests and biomarkersC-reactive protein (CRP and hs-CRP): what your result meansUnderstand high and low CRP results, CRP versus hs-CRP, units, laboratory ranges, causes, repeat testing and cardiovascular context.Updated Aug 2, 202614 minute read

In-depth guideBlood tests and biomarkersCystatin C Blood Test: eGFR, Results & LimitationsUnderstand cystatin C, combined creatinine-cystatin C eGFR, factors that can distort results, and how kidney function is assessed with trends and urine albumin.Updated Aug 28, 202615 minute read

In-depth guideBlood tests and biomarkersA/G Ratio Blood Test: Albumin, Globulin, and ContextLearn how the albumin-to-globulin ratio relates two blood proteins, what can shift it, and why the component results and your clinical context matter most.Updated Sep 25, 20267 minute read

In-depth guideBlood tests and biomarkersBicarbonate (Total CO₂): High & Low ResultsLearn why chemistry-panel total CO₂ mostly reflects bicarbonate and how anion gap, kidneys, breathing and sample handling explain high or low results.Updated Aug 30, 202616 minute read

In-depth guideBlood tests and biomarkersReticulocyte CountUnderstand a reticulocyte count, its percentage and absolute units, and why a result inside the laboratory range may still need context when you have anaemia.Updated Sep 9, 20265 minute read

In-depth guideBlood tests and biomarkersALT Blood Test: High, Low, Ranges & What It MeansUnderstand an ALT blood test, why ranges vary, what high or low ALT can mean, U/L and µkat/L conversion, confounders and safe next steps.Updated Aug 15, 202618 minute read

In-depth guideBlood tests and biomarkersCalcium Blood Test: Total vs Ionized, High and LowUnderstand the calcium blood test, including total versus ionized calcium, albumin context, report intervals, related tests and symptom-led safety guidance.Updated Sep 4, 202613 minute read

In-depth guideBlood tests and biomarkersSerum Folate Blood TestUnderstand serum folate, laboratory-specific cutoffs and red-cell testing. Learn how meals, supplements and vitamin B12 affect the meaning of your result.Updated Sep 21, 20265 minute read

In-depth guideBlood tests and biomarkersMagnesium Blood Test: Low, High, Limits and MeaningLearn what a magnesium blood test measures, how to read low or high flags, why serum has limits, and which report context and symptoms matter.Updated Sep 4, 202613 minute read

In-depth guideBlood tests and biomarkersZinc Blood TestUnderstand serum and plasma zinc results, laboratory ranges and sampling effects. Learn why inflammation, meals and supplements change the meaning of a number.Updated Sep 22, 20265 minute read

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