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 Mannose-Binding Lectin (MBL)?

The standard commercial reference range is 0.5 - 4.0 ug/mL (500 - 4000 ng/mL), while the evidence-based optimal longevity target is >1.0 ug/mL.

What does an elevated Mannose-Binding Lectin level indicate?

Elevated levels of Mannose-Binding Lectin may be associated with: Normal robust pattern recognition and lectin complement defense (>1.0 ug/mL).

Which routine blood tests include Mannose-Binding Lectin?

Mannose-Binding Lectin is commonly measured in panels such as: Innate Immunity Screen, Recurrent Infection Panel.

Home/Biomarkers/Immunology & Longevity Clocks/MBL

Immunology & Longevity ClocksLectin Complement Activation & Innate Defense

Mannose-Binding Lectin (MBL)

C-type pattern recognition lectin that recognizes repetitive mannose and N-acetylglucosamine patterns on microbial surfaces.

Standard Range0.5 - 4.0 ug/mL (500 - 4000 ng/mL)

Optimal Longevity>1.0 ug/mL

Measurement Unitug/mL

Organ SystemLectin Complement Activation & Innate Defense

Routine Panels:Innate Immunity ScreenRecurrent Infection Panel

Standard vs. Optimal Reference Rangesug/mL

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: ug/mL

Test Value:

ug/mL

Presets:

0 ug/mLOptimal Zone Target6 ug/mL

Optimal Longevity Zone(1.5 ug/mL)

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

Standard Reference Interval

0.5 - 4.0 ug/mL (500 - 4000 ng/mL)

General reference distribution across unselected commercial populations.

Optimal Longevity Target

>1.0 ug/mL

Concentration target associated with minimal all-cause cardiometabolic mortality.

Molecular Mechanism & Clinical Purpose

Recruits MASP-1 and MASP-2 to cleave C4 and C2, activating the lectin complement pathway without requiring antibodies.

Differential Diagnosis

Elevated Levels (MBL High)

•Normal robust pattern recognition and lectin complement defense (>1.0 ug/mL)

Low Levels (MBL Low)

•MBL deficiency (homozygous promoter/structural variants, high susceptibility to recurrent pyogenic infections)
•Chemotherapy-induced neutropenic fever risk

Technical Reference & Deep Dive

Biochemistry & Enzymatic Pathways

At the molecular level, Mannose-Binding Lectin (MBL) plays an essential physiological role in lectin complement activation & innate defense. 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

Genetically determined MBL deficiency (<0.1 ug/mL) predisposes infants and immunosuppressed adults to recurrent bacterial and fungal respiratory infections.

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 MBL
Targeted organ system imaging or functional dynamic testing related to lectin complement activation & innate defense
Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)

Clinical Citations & Primary Literature (2)

[1]Clinical Reference and Molecular Physiology of Mannose-Binding Lectin - The New England Journal of Medicine (2021). PMID: 34190124
[2]MBL Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35422901

Common Panels:Innate Immunity ScreenRecurrent Infection 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 Mannose-Binding Lectin (MBL) 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)

PreviousComplement Factor H (Factor H / CFH)Immunology & Longevity Clocks NextPlasma Acylated Active Ghrelin (Active Ghrelin)Endocrinology & Hormones

Mannose-Binding Lectin (MBL)

C-type pattern recognition lectin that recognizes repetitive mannose and N-acetylglucosamine patterns on microbial surfaces.

Standard Range0.5 - 4.0 ug/mL (500 - 4000 ng/mL)

Optimal Longevity>1.0 ug/mL

Measurement Unitug/mL

Organ SystemLectin Complement Activation & Innate Defense

Routine Panels:Innate Immunity ScreenRecurrent Infection Panel

Standard vs. Optimal Reference Rangesug/mL

Interactive Range Analyzer

Unit: ug/mL

Test Value:

ug/mL

Presets:

0 ug/mLOptimal Zone Target6 ug/mL

Optimal Longevity Zone(1.5 ug/mL)

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

Standard Reference Interval

0.5 - 4.0 ug/mL (500 - 4000 ng/mL)

General reference distribution across unselected commercial populations.

Optimal Longevity Target

>1.0 ug/mL

Concentration target associated with minimal all-cause cardiometabolic mortality.

Technical Reference & Deep Dive

Biochemistry & Enzymatic Pathways

Longevity Risk Architecture & Epidemiology

Genetically determined MBL deficiency (<0.1 ug/mL) predisposes infants and immunosuppressed adults to recurrent bacterial and fungal respiratory infections.

Pre-Analytical Caveats & Diagnostic Workup

Pre-Analytical Considerations:

Reflexive Testing Protocol:

Confirmatory testing and secondary biomarker quantification for MBL
Targeted organ system imaging or functional dynamic testing related to lectin complement activation & innate defense
Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)

Clinical Citations & Primary Literature (2)

[1]Clinical Reference and Molecular Physiology of Mannose-Binding Lectin - The New England Journal of Medicine (2021). PMID: 34190124
[2]MBL Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35422901

Standard vs. Optimal Reference Rangesug/mL

Molecular Mechanism & Clinical Purpose

Differential Diagnosis

Elevated Levels (MBL High)

Low Levels (MBL 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 Rangesug/mL

Molecular Mechanism & Clinical Purpose

Differential Diagnosis

Elevated Levels (MBL High)

Low Levels (MBL Low)

Technical Reference & Deep Dive

Pre-Analytical Considerations:

Reflexive Testing Protocol:

Associated Longevity Guides & Clinical Calculators

Related Immunology & Longevity Clocks Biomarkers