{
  "url": "https://openlegislation.uk/tryptophan-in-food-regulations-1990",
  "json_url": "https://openlegislation.uk/tryptophan-in-food-regulations-1990.json",
  "id": "uksi/1990/1728",
  "title": "The Tryptophan in Food Regulations 1990",
  "short_title": "Tryptophan in Food 1990",
  "long_title": "These Regulations prohibit the addition of tryptophan (an amino acid) to food intended for human consumption, and its consequent sale or supply (regulation 2(1) and (2)), subject to an exception for those who require the food on medical grounds (regulation 2(4)). These Regulations also prohibit the exposure for sale of food intended for human consumption containing added tryptophan (regulation 2(3)). Contravention of or failure to comply with these prohibitions is made an offence (regulation 2(5) and (6)).",
  "citation": "S.I. 1990/1728",
  "type": "uksi",
  "year": "1990",
  "number": "1728",
  "version": "current",
  "date": "1990-08-21",
  "revised": false,
  "valid_from": null,
  "extent": null,
  "unapplied_effects": 23,
  "provisions": [
    {
      "path": "introduction",
      "kind": "introduction",
      "number": null,
      "heading": "Introductory text",
      "url": "https://openlegislation.uk/tryptophan-in-food-regulations-1990/introduction",
      "extent": null,
      "status": null,
      "parent": null
    },
    {
      "path": "regulation/1",
      "kind": "regulation",
      "number": "1",
      "heading": "Citation, commencement and interpretation",
      "url": "https://openlegislation.uk/tryptophan-in-food-regulations-1990/regulation-1",
      "extent": null,
      "status": null,
      "parent": null
    },
    {
      "path": "regulation/2",
      "kind": "regulation",
      "number": "2",
      "heading": "Prohibition on sale, etc of food containing tryptophan",
      "url": "https://openlegislation.uk/tryptophan-in-food-regulations-1990/regulation-2",
      "extent": null,
      "status": null,
      "parent": null
    },
    {
      "path": "regulation/3",
      "kind": "regulation",
      "number": "3",
      "heading": "Certificate of public analyst",
      "url": "https://openlegislation.uk/tryptophan-in-food-regulations-1990/regulation-3",
      "extent": null,
      "status": null,
      "parent": null
    },
    {
      "path": "regulation/4",
      "kind": "regulation",
      "number": "4",
      "heading": "Application of various provisions of the Food Act 1984",
      "url": "https://openlegislation.uk/tryptophan-in-food-regulations-1990/regulation-4",
      "extent": null,
      "status": null,
      "parent": null
    },
    {
      "path": "regulation/5",
      "kind": "regulation",
      "number": "5",
      "heading": "Authorities to enforce and execute Regulations",
      "url": "https://openlegislation.uk/tryptophan-in-food-regulations-1990/regulation-5",
      "extent": null,
      "status": null,
      "parent": null
    },
    {
      "path": "signature",
      "kind": "signature",
      "number": null,
      "heading": "Signature",
      "url": "https://openlegislation.uk/tryptophan-in-food-regulations-1990/signature",
      "extent": null,
      "status": null,
      "parent": null
    },
    {
      "path": "note",
      "kind": "note",
      "number": null,
      "heading": "Explanatory note",
      "url": "https://openlegislation.uk/tryptophan-in-food-regulations-1990/note",
      "extent": null,
      "status": null,
      "parent": null
    }
  ],
  "has_text": true,
  "pdfs": [
    {
      "title": "Printed copy",
      "main": true,
      "language": null,
      "date": "2023-11-22",
      "size": 255509,
      "url": "https://openlegislation.uk/tryptophan-in-food-regulations-1990/pdf/uksi_19901728_en.pdf",
      "source_url": "https://www.legislation.gov.uk/uksi/1990/1728/pdfs/uksi_19901728_en.pdf"
    }
  ],
  "outstanding_effects": [
    {
      "type": "words inserted",
      "affected_provisions": "reg. 1(2)",
      "affecting": "uksi/1990/2486",
      "affecting_title": "The Food Safety Act 1990 (Consequential Modifications) (England and Wales) Order 1990",
      "affecting_provisions": "art. 2(2) Sch. 1 Pt. 2"
    },
    {
      "type": "words inserted",
      "affected_provisions": "reg. 1(2)",
      "affecting": "uksi/1990/2486",
      "affecting_title": "The Food Safety Act 1990 (Consequential Modifications) (England and Wales) Order 1990",
      "affecting_provisions": "art. 4(6) Sch. 4 Pt. 2"
    },
    {
      "type": "inserted",
      "affected_provisions": "reg. 2A",
      "affecting": "uksi/1990/2486",
      "affecting_title": "The Food Safety Act 1990 (Consequential Modifications) (England and Wales) Order 1990",
      "affecting_provisions": "art. 5(1) Sch. 5"
    },
    {
      "type": "substituted",
      "affected_provisions": "reg. 3",
      "affecting": "uksi/1990/2486",
      "affecting_title": "The Food Safety Act 1990 (Consequential Modifications) (England and Wales) Order 1990",
      "affecting_provisions": "art. 6(1) Sch. 7"
    },
    {
      "type": "revoked",
      "affected_provisions": "reg. 4",
      "affecting": "uksi/1990/2486",
      "affecting_title": "The Food Safety Act 1990 (Consequential Modifications) (England and Wales) Order 1990",
      "affecting_provisions": "art. 5(2) Sch. 5"
    },
    {
      "type": "words substituted",
      "affected_provisions": "reg. 5",
      "affecting": "uksi/1990/2486",
      "affecting_title": "The Food Safety Act 1990 (Consequential Modifications) (England and Wales) Order 1990",
      "affecting_provisions": "art. 18(12)"
    },
    {
      "type": "words substituted",
      "affected_provisions": "Regulations",
      "affecting": "uksi/1990/2486",
      "affecting_title": "The Food Safety Act 1990 (Consequential Modifications) (England and Wales) Order 1990",
      "affecting_provisions": "art. 2(3) Sch. 1 Pt. 2"
    },
    {
      "type": "words substituted",
      "affected_provisions": "Regulations",
      "affecting": "uksi/1990/2486",
      "affecting_title": "The Food Safety Act 1990 (Consequential Modifications) (England and Wales) Order 1990",
      "affecting_provisions": "art. 4(5) Sch. 4 Pt. 2"
    },
    {
      "type": "inserted",
      "affected_provisions": "reg. 2(4A)",
      "affecting": "uksi/2002/1817",
      "affecting_title": "The Food for Particular Nutritional Uses (Addition of Substances for Specific Nutritional Purposes) (England) Regulations 2002 (revoked)",
      "affecting_provisions": "reg. 10(2)(c)"
    },
    {
      "type": "words inserted",
      "affected_provisions": "reg. 2(3)",
      "affecting": "uksi/2002/1817",
      "affecting_title": "The Food for Particular Nutritional Uses (Addition of Substances for Specific Nutritional Purposes) (England) Regulations 2002 (revoked)",
      "affecting_provisions": "reg. 10(2)(b)"
    },
    {
      "type": "words inserted",
      "affected_provisions": "reg. 2(7)",
      "affecting": "uksi/2002/1817",
      "affecting_title": "The Food for Particular Nutritional Uses (Addition of Substances for Specific Nutritional Purposes) (England) Regulations 2002 (revoked)",
      "affecting_provisions": "reg. 10(2)(d)(i)"
    },
    {
      "type": "words inserted",
      "affected_provisions": "reg. 2(7)",
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      "affecting_title": "The Food for Particular Nutritional Uses (Addition of Substances for Specific Nutritional Purposes) (England) Regulations 2002 (revoked)",
      "affecting_provisions": "reg. 10(2)(d)(ii)"
    },
    {
      "type": "words substituted",
      "affected_provisions": "reg. 2(1)(2)",
      "affecting": "uksi/2002/1817",
      "affecting_title": "The Food for Particular Nutritional Uses (Addition of Substances for Specific Nutritional Purposes) (England) Regulations 2002 (revoked)",
      "affecting_provisions": "reg. 10(2)(a)"
    },
    {
      "type": "words substituted",
      "affected_provisions": "reg. 2(7)",
      "affecting": "uksi/2003/3207",
      "affecting_title": "The Processed Cereal-based Foods and Baby Foods for Infants and Young Children (England) Regulations 2003",
      "affecting_provisions": "reg. 14(1) (2)"
    },
    {
      "type": "revoked",
      "affected_provisions": "Regulations",
      "affecting": "uksi/2005/2630",
      "affecting_title": "The Tryptophan in Food (England) Regulations 2005",
      "affecting_provisions": "reg. 10(1)"
    },
    {
      "type": "words inserted",
      "affected_provisions": "reg. 2(7)",
      "affecting": "wsi/2002/2939",
      "affecting_title": "The Food for Particular Nutritional Uses (Addition of Substances for Specific Nutritional Purposes) (Wales) Regulations 2002",
      "affecting_provisions": "reg. 10(2)(d)(ii)"
    },
    {
      "type": "words inserted",
      "affected_provisions": "reg. 2(7)",
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      "affecting_title": "The Food for Particular Nutritional Uses (Addition of Substances for Specific Nutritional Purposes) (Wales) Regulations 2002",
      "affecting_provisions": "reg. 10(2)(d)(i)"
    },
    {
      "type": "word omitted",
      "affected_provisions": "reg. 2(7)",
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      "affecting_title": "The Food for Particular Nutritional Uses (Addition of Substances for Specific Nutritional Purposes) (Wales) Regulations 2002",
      "affecting_provisions": "reg. 10(2)(d)(ii)"
    },
    {
      "type": "words substituted",
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      "affecting_title": "The Food for Particular Nutritional Uses (Addition of Substances for Specific Nutritional Purposes) (Wales) Regulations 2002",
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    {
      "type": "words inserted",
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      "affecting_title": "The Food for Particular Nutritional Uses (Addition of Substances for Specific Nutritional Purposes) (Wales) Regulations 2002",
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    {
      "type": "inserted",
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      "affecting_title": "The Food for Particular Nutritional Uses (Addition of Substances for Specific Nutritional Purposes) (Wales) Regulations 2002",
      "affecting_provisions": "reg. 10(2)(c)"
    },
    {
      "type": "words substituted",
      "affected_provisions": "reg. 2(7)",
      "affecting": "wsi/2004/314",
      "affecting_title": "The Processed Cereal-based Foods and Baby Foods for Infants and Young Children (Wales) Regulations 2004",
      "affecting_provisions": "reg. 14"
    },
    {
      "type": "revoked",
      "affected_provisions": "Regulations",
      "affecting": "wsi/2005/3111",
      "affecting_title": "The Tryptophan in Food (Wales) Regulations 2005",
      "affecting_provisions": "reg. 10(1)"
    }
  ],
  "made_under": [
    {
      "id": "ukpga/1984/30",
      "title": "Food Act 1984",
      "url": "https://openlegislation.uk/food-act-1984",
      "provisions": [
        "section/4",
        "section/74",
        "section/118"
      ]
    }
  ],
  "changes_made_to": 23,
  "changes_made_to_url": "https://openlegislation.uk/tryptophan-in-food-regulations-1990/changes.json",
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  "changes_made_by_url": "https://openlegislation.uk/tryptophan-in-food-regulations-1990/changes/by-it.json",
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  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1990/1728",
    "retrieved_at": "2026-10-29T15:08:02.514589+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}