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 Pseudocholinesterase (PChE / BChE)?

The standard commercial reference range is 5,000 - 13,000 U/L, while the evidence-based optimal longevity target is 6,500 - 11,500 U/L.

What does an elevated Serum Pseudocholinesterase level indicate?

Elevated levels of Serum Pseudocholinesterase may be associated with: Nephrotic syndrome and hyperlipidemia, Fatty liver disease without cirrhosis.

Which routine blood tests include Serum Pseudocholinesterase?

Serum Pseudocholinesterase is commonly measured in panels such as: Liver Synthetic Capacity, Anesthesia Clearance Panel.

Home/Biomarkers/Hepatic & Biliary Function/PChE / BChE

Hepatic & Biliary FunctionHepatic Synthetic Mass & Toxicology

Serum Pseudocholinesterase (PChE / BChE)

Hepatically synthesized glycoprotein enzyme that hydrolyzes choline esters, reflecting true liver synthetic mass.

Standard Range5,000 - 13,000 U/L

Optimal Longevity6,500 - 11,500 U/L

Measurement UnitU/L

Organ SystemHepatic Synthetic Mass & Toxicology

Routine Panels:Liver Synthetic CapacityAnesthesia Clearance Panel

Standard vs. Optimal Reference RangesU/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: U/L

Test Value:

U/L

Presets:

0 U/LOptimal Zone Target675 U/L

Elevated / Out of Range(255.5 U/L)

Exceeds standard commercial reference interval. Clinical correlation recommended.

Standard Reference Interval

5,000 - 13,000 U/L

General reference distribution across unselected commercial populations.

Optimal Longevity Target

6,500 - 11,500 U/L

Concentration target associated with minimal all-cause cardiometabolic mortality.

Molecular Mechanism & Clinical Purpose

Catalyzes hydrolysis of succinylcholine, mivacurium, and cocaine in plasma; synthesized solely by functional hepatocytes.

Differential Diagnosis

Elevated Levels (PChE / BChE High)

•Nephrotic syndrome and hyperlipidemia
•Fatty liver disease without cirrhosis

Low Levels (PChE / BChE Low)

•Advanced cirrhosis and liver failure
•Organophosphate/carbamate insecticide poisoning
•Genetic atypical BCHE mutation (prolonged succinylcholine apnea)

Technical Reference & Deep Dive

Biochemistry & Enzymatic Pathways

At the molecular level, Serum Pseudocholinesterase (PChE / BChE) is critically involved in hepatic synthetic mass & toxicology. 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

Sensitive marker of functional liver parenchymal mass and predictor of prolonged paralysis following surgical neuromuscular blockade.

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 PChE / BChE
Targeted imaging or functional organ assessment related to hepatic synthetic mass & toxicology
Comprehensive metabolic and inflammatory baseline panel (CMP, CBC, hs-CRP)

Clinical Citations & Primary Literature (2)

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

Common Panels:Liver Synthetic CapacityAnesthesia Clearance 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 Pseudocholinesterase (PChE / BChE) 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)

PreviousSerum Selenium (Se)Micronutrients & Vitamins NextTotal Serum Bile Acids (SBA)Hepatic & Biliary Function

Serum Pseudocholinesterase (PChE / BChE)

Hepatically synthesized glycoprotein enzyme that hydrolyzes choline esters, reflecting true liver synthetic mass.

Standard Range5,000 - 13,000 U/L

Optimal Longevity6,500 - 11,500 U/L

Measurement UnitU/L

Organ SystemHepatic Synthetic Mass & Toxicology

Routine Panels:Liver Synthetic CapacityAnesthesia Clearance Panel

Standard vs. Optimal Reference RangesU/L

Interactive Range Analyzer

Unit: U/L

Test Value:

U/L

Presets:

0 U/LOptimal Zone Target675 U/L

Elevated / Out of Range(255.5 U/L)

Exceeds standard commercial reference interval. Clinical correlation recommended.

Standard Reference Interval

5,000 - 13,000 U/L

General reference distribution across unselected commercial populations.

Optimal Longevity Target

6,500 - 11,500 U/L

Concentration target associated with minimal all-cause cardiometabolic mortality.

Technical Reference & Deep Dive

Biochemistry & Enzymatic Pathways

Longevity Risk Architecture & Epidemiology

Sensitive marker of functional liver parenchymal mass and predictor of prolonged paralysis following surgical neuromuscular blockade.

Pre-Analytical Caveats & Diagnostic Workup

Pre-Analytical Considerations:

Reflexive Testing Protocol:

Confirmatory testing and secondary biomarker panel evaluation for PChE / BChE
Targeted imaging or functional organ assessment related to hepatic synthetic mass & toxicology
Comprehensive metabolic and inflammatory baseline panel (CMP, CBC, hs-CRP)

Clinical Citations & Primary Literature (2)

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

Standard vs. Optimal Reference RangesU/L

Molecular Mechanism & Clinical Purpose

Differential Diagnosis

Elevated Levels (PChE / BChE High)

Low Levels (PChE / BChE Low)

Technical Reference & Deep Dive

Pre-Analytical Considerations:

Reflexive Testing Protocol:

Associated Longevity Guides & Clinical Calculators

Related Hepatic & Biliary Function Biomarkers

Standard vs. Optimal Reference RangesU/L

Molecular Mechanism & Clinical Purpose

Differential Diagnosis

Elevated Levels (PChE / BChE High)

Low Levels (PChE / BChE Low)

Technical Reference & Deep Dive

Pre-Analytical Considerations:

Reflexive Testing Protocol:

Associated Longevity Guides & Clinical Calculators

Related Hepatic & Biliary Function Biomarkers