This website present Iodinated Density Gradient Media originally introduced by the Norwegian company Nyegaard & Co/Nycomed in the period 1973-1994. Some of these products have been on the market for more than 45 years. All the liquid products are today produced by Serumwerk Bernburg AG, Germany
In collaboration with scientific institutions and companies, several unique products have been brought to the market; Lymphoprep, Polysucrose 400, Polymorphprep, Nycodenz and OptiPrep.