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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 biomarkers.Non-HDL Cholesterol: Formula, Goals & MeaningCalculate non-HDL cholesterol, understand which particles it represents, and interpret goals with LDL, triglycerides, ApoB and overall cardiovascular risk.Updated 29 Aug 202615 minute read

In-depth guideBlood tests and biomarkers.Sodium Blood Test: Low, High and What Results MeanLearn how a sodium blood test reflects water balance, why your report interval matters, and how low or high results fit symptoms, medicines and other tests.Updated 4 Sept 202613 minute read

In-depth guideBlood tests and biomarkers.Aldosterone Blood Test: Renin, Posture and LimitsLearn what aldosterone measures, why renin, posture and potassium matter, and why aldosterone-renin ratio cutoffs depend on methods and units.Updated 28 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Anti-Müllerian Hormone (AMH): Ovarian Reserve and What It Cannot PredictA careful guide to Anti-Müllerian hormone, including ovarian reserve, fertility-treatment response, age, assay, contraception, units and why AMH is not a stand-alone fertility or PCOS test.Updated 5 Sept 202613 minute read

In-depth guideBlood tests and biomarkers.Urine Protein-Creatinine Ratio: UPCR vs UACRLearn what a spot urine protein-creatinine ratio measures, why UPCR differs from UACR, and how sample timing, units and repeat tests affect its meaning.Updated 24 Sept 20267 minute read

In-depth guideBlood tests and biomarkers.Copper Blood TestUnderstand total serum copper, laboratory ranges and ceruloplasmin. Learn why inflammation, hormones, zinc and sample handling affect high or low results.Updated 22 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.DHEA-S Blood Test: Meaning, Age and Clinical ContextLearn what a DHEA-S result can show about adrenal androgen production, why age, sex, assay and symptoms matter, and why a result cannot diagnose a condition by itself.Updated 4 Sept 202614 minute read

In-depth guideBlood tests and biomarkers.ACTH Blood Test: Cortisol Context and TimingUnderstand what an ACTH blood test measures, why cortisol and collection time matter, and how the test differs from ACTH stimulation.Updated 28 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Serum Iron Blood TestUnderstand what serum iron measures, why timing matters and how it differs from ferritin. Read high or low results with the complete iron panel.Updated 20 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Fibrinogen Blood Test: Meaning, Units and Clinical ContextUnderstand fibrinogen's role in clotting, what high or low activity can mean, and why the assay, sample quality and local laboratory interval matter.Updated 6 Sept 202610 minute read

In-depth guideBlood tests and biomarkers.PTH Blood Test: Meaning, Calcium and Kidney ContextUnderstand what a parathyroid hormone result can show, why it belongs with calcium and related tests, and how primary, secondary and kidney-related patterns differ.Updated 4 Sept 202614 minute read

In-depth guideBlood tests and biomarkers.Amylase Blood TestLearn what an amylase blood test measures, why high values have several possible causes, and how specimen type, timing, lipase and laboratory ranges matter.Updated 9 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Free T4 Blood Test: Meaning, TSH and Result ContextUnderstand free T4, how it differs from total T4, and why TSH, medicines, pregnancy and laboratory interference matter when reading a thyroid result.Updated 8 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Lipase Blood TestLearn what a lipase blood test measures, why laboratory ranges and timing matter, and why a high value alone cannot diagnose pancreatitis or measure recovery.Updated 8 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Phosphate (Phosphorus) Blood TestUnderstand phosphate blood results, age-specific laboratory ranges, and the roles of kidneys, calcium and PTH. A blood value is not a dietary intake score.Updated 12 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Prolactin (PRL) Blood Test: Meaning and Clinical ContextUnderstand what a prolactin or PRL result can and cannot show, and why timing, medicines, pregnancy, stress, thyroid and kidney context matter.Updated 6 Sept 202611 minute read

In-depth guideBlood tests and biomarkers.Chloride Blood Test: Low, High and Acid-Base ContextLearn how to read a chloride blood test, including low and high results, report-specific intervals, related electrolytes, trends and symptom-led safety.Updated 4 Sept 202613 minute read

In-depth guideBlood tests and biomarkers.Total Iron-Binding Capacity (TIBC)Understand high or low TIBC, its relationship to transferrin and UIBC, and why binding capacity must be read with iron, ferritin and clinical context.Updated 20 Sept 20265 minute read

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