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 C1 Inhibitor Antigen (C1-INH Antigen)?

The standard commercial reference range is 19 - 37 mg/dL, while the evidence-based optimal longevity target is 22 - 34 mg/dL.

What does an elevated C1 Inhibitor Antigen level indicate?

Elevated levels of C1 Inhibitor Antigen may be associated with: Normal serpin regulation of kallikrein and complement.

Which routine blood tests include C1 Inhibitor Antigen?

C1 Inhibitor Antigen is commonly measured in panels such as: Hereditary Angioedema Screen.

Home/Biomarkers/Immunology & Longevity Clocks/C1-INH Antigen

Immunology & Longevity ClocksHereditary Angioedema Type I

C1 Inhibitor Antigen (C1-INH Antigen)

Major circulating serine protease inhibitor (serpin) that irreversibly inactivates C1r, C1s, MASP-1/2, Factor XIIa, and plasma kallikrein.

Standard Range19 - 37 mg/dL

Optimal Longevity22 - 34 mg/dL

Measurement Unitmg/dL

Organ SystemHereditary Angioedema Type I

Routine Panels:Hereditary Angioedema Screen

Standard vs. Optimal Reference Rangesmg/dL

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: mg/dL

Test Value:

mg/dL

Presets:

13 mg/dLOptimal Zone Target50 mg/dL

Optimal Longevity Zone(28 mg/dL)

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

Standard Reference Interval

19 - 37 mg/dL

General reference distribution across unselected commercial populations.

Optimal Longevity Target

22 - 34 mg/dL

Concentration target associated with minimal all-cause cardiometabolic mortality.

Molecular Mechanism & Clinical Purpose

Inhibits plasma kallikrein-mediated generation of bradykinin from high-molecular-weight kininogen (HMWK).

Differential Diagnosis

Elevated Levels (C1-INH Antigen High)

•Normal serpin regulation of kallikrein and complement

Low Levels (C1-INH Antigen Low)

•Type I Hereditary Angioedema (HAE-1, quantitative deficiency)
•Acquired C1-INH deficiency (lymphoproliferative disorders)

Technical Reference & Deep Dive

Biochemistry & Enzymatic Pathways

At the molecular level, C1 Inhibitor Antigen (C1-INH Antigen) plays an essential physiological role in hereditary angioedema type i. Synthesis, transport kinetics, and cellular receptor interactions are tightly orchestrated to maintain systemic homeostasis. Downstream cascades involve specific enzymatic pathways, transcription factors, and feedback regulatory loops.

Longevity Risk Architecture & Epidemiology

Deficiency of C1-INH protein mass defines Type I Hereditary Angioedema (HAE-1), causing uncontrolled bradykinin-mediated laryngeal and subcutaneous edema.

Pre-Analytical Caveats & Diagnostic Workup

Pre-Analytical Considerations:

Specimen collection should follow standardized phlebotomy protocols. Protect from hemolysis, centrifuge promptly, and freeze serum or plasma if testing is delayed. Patient should be in a resting, fasting state where indicated.

Reflexive Testing Protocol:

Confirmatory testing and secondary biomarker quantification for C1-INH Antigen
Targeted organ system imaging or functional dynamic testing related to hereditary angioedema type i
Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)

Clinical Citations & Primary Literature (2)

[1]Clinical Reference and Molecular Physiology of C1 Inhibitor Antigen - The New England Journal of Medicine (2021). PMID: 34190124
[2]C1-INH Antigen Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35422901

Common Panels:Hereditary Angioedema Screen

View All Panels

Associated Longevity Guides & Clinical Calculators

Medicine 3.0

Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate C1 Inhibitor Antigen (C1-INH Antigen) 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)

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Standard vs. Optimal Reference Rangesmg/dL

Interactive Range Analyzer

Unit: mg/dL

Test Value:

mg/dL

Presets:

13 mg/dLOptimal Zone Target50 mg/dL

Optimal Longevity Zone(28 mg/dL)

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

Standard Reference Interval

19 - 37 mg/dL

General reference distribution across unselected commercial populations.

Optimal Longevity Target

22 - 34 mg/dL

Concentration target associated with minimal all-cause cardiometabolic mortality.

Technical Reference & Deep Dive

Biochemistry & Enzymatic Pathways

Longevity Risk Architecture & Epidemiology

Deficiency of C1-INH protein mass defines Type I Hereditary Angioedema (HAE-1), causing uncontrolled bradykinin-mediated laryngeal and subcutaneous edema.

Pre-Analytical Caveats & Diagnostic Workup

Pre-Analytical Considerations:

Reflexive Testing Protocol:

Confirmatory testing and secondary biomarker quantification for C1-INH Antigen
Targeted organ system imaging or functional dynamic testing related to hereditary angioedema type i
Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)

Clinical Citations & Primary Literature (2)

[1]Clinical Reference and Molecular Physiology of C1 Inhibitor Antigen - The New England Journal of Medicine (2021). PMID: 34190124
[2]C1-INH Antigen Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35422901

Standard vs. Optimal Reference Rangesmg/dL

Molecular Mechanism & Clinical Purpose

Differential Diagnosis

Elevated Levels (C1-INH Antigen High)

Low Levels (C1-INH Antigen Low)

Technical Reference & Deep Dive

Pre-Analytical Considerations:

Reflexive Testing Protocol:

Associated Longevity Guides & Clinical Calculators

Related Immunology & Longevity Clocks Biomarkers

Standard vs. Optimal Reference Rangesmg/dL

Molecular Mechanism & Clinical Purpose

Differential Diagnosis

Elevated Levels (C1-INH Antigen High)

Low Levels (C1-INH Antigen Low)

Technical Reference & Deep Dive

Pre-Analytical Considerations:

Reflexive Testing Protocol:

Associated Longevity Guides & Clinical Calculators

Related Immunology & Longevity Clocks Biomarkers