Gentian Diagnostics ASA engages in the research, development, production, marketing, and distribution of immunoassays. Its products include GCAL Calprotrectin, Crystatin C, Retinol-Binding Protein, Canine CRP, SARS-CoV-2 Total Ab, NT-proBNP Pre-Launch, BÜHLMANN products, IFU documents, and safety data sheets. The company was founded by Erling M. H. Sundrehagen and Bård Sundrehagen in 2001 and is headquartered in Moss, Norway.