According to Regulation (EU) No 1169/2011 (Food Information Regulation, FIR), there is a labeling requirement for substances that may cause allergies or intolerances for both packaged and unpackaged foods. The main regulations are governed by Article 21 of the FIR. The manner of labeling non-prepackaged foods is regulated by the Provisional Food Information Supplementary Regulation (VorlLMIEV).
The substances to be declared and products made from them are listed in Annex II of Regulation (EU) No 1169/2011.