Food quality depends on the production, primary processing and further processing of agricultural raw materials. We deal with the quality characteristics of raw materials and foodstuffs and their contamination by harmful substances. For example, we adapt existing protocols for the metabolism of pesticides in crop plants and animals to veterinary drugs, feed additives and new livestock taxa. We are also developing cell-metabolic alternatives to animal experiments. We track degradation and transformation products using radioactive labelling, including during food processing. Within the Fraunhofer Agriculture and Food Industry Alliance, these issues are extended to the entire food chain.