{
  "$schema": "https://foodadditiveindex.com/api/v1/schema.json",
  "id": "https://foodadditiveindex.com/additives/soy-leghemoglobin",
  "slug": "soy-leghemoglobin",
  "name": "Soy leghemoglobin",
  "identifiers": {
    "e_number": null,
    "ins_number": null,
    "cas_number": null,
    "inchikey": null,
    "pubchem_cid": null
  },
  "functional_class": null,
  "summary": "Soy leghemoglobin is the iron-carrying protein that makes plant-based burgers look and bleed like meat. It is the colour most people have eaten without knowing it has a colour additive listing at all.",
  "derivation_summary": "Produced by fermentation with genetically engineered Pichia pastoris yeast carrying the gene from soybean root nodules, rather than extracted from soy plants. The protein is the same one the plant makes; the production route is not.",
  "regulatory_status": [
    {
      "jurisdiction": "US",
      "jurisdiction_name": "United States",
      "authority": "Food and Drug Administration",
      "status": "permitted",
      "status_label": "Permitted",
      "provision_count": 1,
      "provisions": [
        {
          "status": "permitted",
          "food_category": null,
          "max_level": null,
          "max_level_unit": null,
          "conditions": null,
          "effective_from": null,
          "citation": {
            "ref": "21 CFR 73.520",
            "url": "https://www.ecfr.gov/current/title-21/section-73.520"
          },
          "source": "ecfr",
          "retrieved_at": "2026-09-07T18:25:51.549Z"
        }
      ]
    },
    {
      "jurisdiction": "CODEX",
      "jurisdiction_name": "Codex Alimentarius",
      "authority": "Codex Alimentarius Commission / JECFA",
      "status": "not_listed",
      "status_label": "Not listed",
      "note": "Does not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.",
      "provision_count": 0,
      "provisions": []
    }
  ],
  "names": [
    {
      "name": "Soy leghemoglobin",
      "type": "label",
      "source": "ecfr"
    }
  ],
  "hazard_reference_values": [],
  "sources": [
    {
      "key": "ecfr",
      "name": "Electronic Code of Federal Regulations, Title 21",
      "publisher": "U.S. Government Publishing Office / National Archives",
      "licence": "Public domain",
      "url": "https://www.ecfr.gov/api/versioner/v1/full/2026-08-31/title-21.xml",
      "retrieved_at": "2026-09-07T18:25:51.549Z"
    }
  ],
  "citation_policy": "Cite as: Food Additive Index, \"Soy leghemoglobin\", https://foodadditiveindex.com/additives/soy-leghemoglobin. This site reports regulatory status and does not rate additives.",
  "generated_at": "2026-09-08T00:09:38.713Z"
}