The Metabolic Panel 1 Control Pack consists of three levels of controls, each containing known concentrations of recombinant proteins (insulin, glucagon, and leptin) and synthetic peptides (C-Peptide, GIP (1-42), PP, and amidated GLP-1 (7-36)). The Metabolic Panel 1 Controls are prepared by spiking the synthetic and recombinant calibrator into a non-matrix-based diluent and are lyophilized. The concentrations of the controls are provided in the lot-specific certificate of analysis.