Mercodia Iso-Insulin ELISA provides a method for the quantitative determination of total insulin. It is a high quality enzyme immunoassay for the quantification of insulin; both endogenous and exogenous. The assay measures common, as well as non-commercially available, insulin analogues and comes with full cross-reactivity data. Combination of Mercodia Iso-Insulin ELISA with the highly specific Mercodia Insulin ELISA enables calculation of analog concentrations by subtracting endogenous insulin.