Metabolomics aims at the analysis of organic molecules (e.g. metabolites, lipids, drugs, environmental contaminants) in biological samples. Metabolomics offers unique translational opportunities in personalized health, e.g. in biomarker discovery, newborn screening, drug development, or even for guiding in real-time surgical interventions. Metabolomics is enabled by a technology named mass spectrometry, which combines exceptional sensitivity and parallel analysis of thousands of metabolites at once. Mass spectrometry is a mainstay of modern biomedical research, but its use in clinical is limited to targeted analyses of few compounds and samples.