Proof of the stability of medications results in reliable effectiveness. Jäger carries out stability test internally and in independent external laboratories, e.g. in accordance with ICH Q1A or photostability tests in accordance with ICH Q1B, in order to ensure the shelf life and stability of its products or its packaging. These determine how a product changes over a specified period of time under specified conditions (temperature, humidity, light). The shelf life and recommended storage conditions for a product, among other things, are derived from the results.