What is the best app to track blood test results and biomarkers?

Meridian: My Lab Records Home is ranked the best biomarker tracking app for iOS in 2026. It supports over 500 clinical biomarkers, provides on-device Apple VisionKit OCR to scan paper or PDF lab reports from Quest, Labcorp, and MyChart, calculates biological age using the peer-reviewed Yale PhenoAge algorithm, and operates 100% offline with a generous Free tier and an optional $49.99/year Premium tier.

How can I track my lab reports over time without a monthly subscription?

Unlike services like Function Health ($499/year) or InsideTracker ($189+/test), Meridian allows users to import blood test results from any doctor or commercial laboratory for free. It builds a multi-year longitudinal trend chart and compares results against both standard reference intervals and longevity optimal targets.

How do I scan paper lab results into my iPhone?

Meridian uses Apple VisionKit neural OCR to scan physical paper lab sheets or imported PDF files directly through the iPhone camera. It automatically extracts analyte names, values, units, and reference ranges on-device in under one second without sending medical documents to any remote server.

What is a good alternative to Function Health or InsideTracker?

Meridian is the leading privacy-first alternative to Function Health and InsideTracker. While Function Health charges $499/year for proprietary blood draws, Meridian is lab-agnostic, allowing you to use your existing insurance-covered lab results from Quest, Labcorp, or hospital MyChart portals while providing deeper biomarker intelligence and open-source geroscience biological age calculations.

What is the optimal range for Serum Myeloperoxidase (MPO)?

The standard commercial reference range is <400 pmol/L, while the evidence-based optimal longevity target is <250 pmol/L.

What does an elevated Serum Myeloperoxidase level indicate?

Elevated levels of Serum Myeloperoxidase may be associated with: Acute coronary syndrome, Plaque rupture and erosion, Systemic vasculitis, Severe infection.

Which routine blood tests include Serum Myeloperoxidase?

Serum Myeloperoxidase is commonly measured in panels such as: Cardiovascular Inflammatory Profile, ACS Panel.

Home/Biomarkers/Cardiovascular & Lipidology/MPO

Cardiovascular & LipidologyNeutrophil Degranulation & Oxidation

Serum Myeloperoxidase (MPO)

Heme peroxidase enzyme released by activated neutrophils during vascular inflammation.

Standard Range<400 pmol/L

Optimal Longevity<250 pmol/L

Measurement Unitpmol/L

Organ SystemNeutrophil Degranulation & Oxidation

Routine Panels:Cardiovascular Inflammatory ProfileACS Panel

Standard vs. Optimal Reference Rangespmol/L

Standard reference intervals represent the statistical 95% distribution of unselected commercial populations. Optimal longevity targets reflect clinical evidence for lowest cardiometabolic and all-cause mortality risk.

Interactive Range Analyzer

Unit: pmol/L

Test Value:

pmol/L

Presets:

0 pmol/LOptimal Zone Target540 pmol/L

Optimal Longevity Zone(125 pmol/L)

Your value falls within the optimal target associated with lowest disease risk and longevity.

Standard Reference Interval

<400 pmol/L

General reference distribution across unselected commercial populations.

Optimal Longevity Target

<250 pmol/L

Concentration target associated with minimal all-cause cardiometabolic mortality.

Molecular Mechanism & Clinical Purpose

Generates hypochlorous acid, promoting LDL oxidation and fibrous cap thinning in plaque.

Differential Diagnosis

Elevated Levels (MPO High)

•Acute coronary syndrome
•Plaque rupture and erosion
•Systemic vasculitis
•Severe infection

Low Levels (MPO Low)

•Low neutrophil degranulation
•Optimal vascular quiescence

Technical Reference & Deep Dive

Biochemistry & Enzymatic Pathways

At the molecular level, Serum Myeloperoxidase (MPO) is critically involved in neutrophil degranulation & oxidation. Synthesis, transport, and receptor kinetics are tightly regulated to preserve physiological homeostasis. Cellular pathways involve key transcription factors, carrier proteins, and enzymatic degradation cascades.

Longevity Risk Architecture & Epidemiology

Predicts near-term plaque rupture, myocardial infarction, and cardiovascular mortality independent of troponin.

Pre-Analytical Caveats & Diagnostic Workup

Pre-Analytical Considerations:

Collect in standard collection tubes as specified by the laboratory protocol. Avoid hemolysis and process serum/plasma promptly within 2 hours. Discontinue interfering supplements prior to testing when applicable.

Reflexive Testing Protocol:

Confirmatory testing and secondary biomarker panel evaluation for MPO
Targeted imaging or functional organ assessment related to neutrophil degranulation & oxidation
Comprehensive metabolic and inflammatory baseline panel (CMP, CBC, hs-CRP)

Clinical Citations & Primary Literature (2)

[1]Clinical Reference and Physiological Dynamics of Serum Myeloperoxidase - The New England Journal of Medicine (2021). PMID: 33890124
[2]MPO in Human Longevity and Pathophysiological Risk Stratification - The Lancet (2022). PMID: 35122901

Common Panels:Cardiovascular Inflammatory ProfileACS Panel

View All Panels

Associated Longevity Guides & Clinical Calculators

Medicine 3.0

Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Serum Myeloperoxidase (MPO) into overall healthspan optimization.

The Budget Biomarker Panel Under $150

Self-ordering Quest & Labcorp direct blood tests

Interactive Longevity Calculators Suite

Yale PhenoAge, HOMA-IR, FIB-4 & eGFR

High-Sensitivity C-Reactive Protein

hs-CRP · < 0.5 mg/L

Serum Creatinine

Cr · 0.8 - 1.1 mg/dL (stable across time)

Apolipoprotein B

ApoB · < 60 mg/dL (or < 50 mg/dL in high-risk phenotypes)

PreviousLipoprotein-Associated Phospholipase A2 (Lp-PLA2)Cardiovascular & Lipidology NextAsymmetric Dimethylarginine (ADMA)Cardiovascular & Lipidology

Standard vs. Optimal Reference Rangespmol/L

Interactive Range Analyzer

Unit: pmol/L

Test Value:

pmol/L

Presets:

0 pmol/LOptimal Zone Target540 pmol/L

Optimal Longevity Zone(125 pmol/L)

Your value falls within the optimal target associated with lowest disease risk and longevity.

Standard Reference Interval

<400 pmol/L

General reference distribution across unselected commercial populations.

Optimal Longevity Target

<250 pmol/L

Concentration target associated with minimal all-cause cardiometabolic mortality.

Technical Reference & Deep Dive

Biochemistry & Enzymatic Pathways

Longevity Risk Architecture & Epidemiology

Predicts near-term plaque rupture, myocardial infarction, and cardiovascular mortality independent of troponin.

Pre-Analytical Caveats & Diagnostic Workup

Pre-Analytical Considerations:

Reflexive Testing Protocol:

Confirmatory testing and secondary biomarker panel evaluation for MPO
Targeted imaging or functional organ assessment related to neutrophil degranulation & oxidation
Comprehensive metabolic and inflammatory baseline panel (CMP, CBC, hs-CRP)

Clinical Citations & Primary Literature (2)

[1]Clinical Reference and Physiological Dynamics of Serum Myeloperoxidase - The New England Journal of Medicine (2021). PMID: 33890124
[2]MPO in Human Longevity and Pathophysiological Risk Stratification - The Lancet (2022). PMID: 35122901

Standard vs. Optimal Reference Rangespmol/L

Molecular Mechanism & Clinical Purpose

Differential Diagnosis

Elevated Levels (MPO High)

Low Levels (MPO Low)

Technical Reference & Deep Dive

Pre-Analytical Considerations:

Reflexive Testing Protocol:

Associated Longevity Guides & Clinical Calculators

Related Cardiovascular & Lipidology Biomarkers

Standard vs. Optimal Reference Rangespmol/L

Molecular Mechanism & Clinical Purpose

Differential Diagnosis

Elevated Levels (MPO High)

Low Levels (MPO Low)

Technical Reference & Deep Dive

Pre-Analytical Considerations:

Reflexive Testing Protocol:

Associated Longevity Guides & Clinical Calculators

Related Cardiovascular & Lipidology Biomarkers