Procedural Rigor and Reproducibility in NMR Metabolomics: Community Practices and Challenges

Area of Science:

• Metabolomics
• Analytical Chemistry
• Biochemistry

Background:

• Nuclear magnetic resonance (NMR) spectroscopy is a key technique in metabolomics, offering quantitative accuracy and broad applicability.
• Despite its strengths, methodological inconsistencies, poor protocol reporting, and limited infrastructure impede reproducibility and data sharing in NMR metabolomics.

Purpose of the Study:

• To assess the current state of Quality Assurance (QA) and Quality Control (QC) practices in global NMR metabolomics.
• To identify challenges and opportunities for improving reproducibility and data sharing in the field.

Main Methods:

• A comprehensive questionnaire was developed and distributed worldwide to researchers in NMR-based metabolomics.
• 75 responses were collected from a diverse cohort across academia, clinics, and core facilities, focusing on QA/QC implementation.

Main Results:

• While most labs have Standard Operating Procedures (SOPs), protocol deviations are common and undocumented, impacting reproducibility.
• Implementation of QC practices like pooled samples is inconsistent, and less than 10% of data is shared publicly.
• Formal regulatory oversight and dedicated QA personnel are rare, and training often lacks depth in critical areas like data analysis.

Conclusions:

• The NMR metabolomics community is skilled but faces constraints due to infrastructure variability and inconsistent best practice implementation.
• Adaptive standardization, structured training, and enhanced institutional support are essential for improving transparency, reproducibility, and the overall impact of NMR metabolomics.