A reference standard for metabolites is a compound that is used to calibrate and validate analytical methods for the quantification of metabolites. It is a material with a known concentration of the target analyte(s). Reference standards are essential for ensuring the accuracy and reproducibility of metabolomics data. IROA Technologies offers a variety of reference standards for metabolites, including:br br Stable isotope-labeled standards: These standards are compounds that are identical to the target analyte, except for the presence of a stable isotope. They are used to correct for ion suppression and to calibrate mass spectrometers.br br Natural abundance standards: These standards are compounds that contain the target analyte in its naturally occurring abundance. They are used to validate analytical methods and to assess the accuracy of quantification.