Tryptophan in Food (Wales) Regulations 2005 (W.S.I. No. 3111 (W. 231) of 2005). Country/Territory United Kingdom Territorial subdivision Wales Document type Regulation Date 2005 Source FAO, FAOLEX Subject Food & nutrition Keyword Food quality control/food safety Food additives Geographical area Atlantic Ocean Islands, Europe, Europe and Central Asia, North Atlantic, North Sea, North-East Atlantic, Northern Europe Abstract These Regulations prohibit the addition of tryptophan, an amino acid, to food and prohibit the sale, offer for sale and exposure for sale of food containing tryptophan, subject to exceptions. The Regulations define offences and prescribe penalties. Full text English Website www.opsi.gov.uk References - Legislation Implements Food Safety Act 1990. Legislation | United Kingdom | 1990 (2021) Keyword: Basic legislation, Food quality control/food safety, Fraud, Inspection, Institution Source: FAO, FAOLEX