{
  "algorithm": "Nutri-Score",
  "version": "2023 (updated algorithm)",
  "source": "Eurofins referencing Santé Publique France FAQ v21.Dec.2023",
  "source_url": "https://www.eurofins.de/food-analysis/other-services/nutri-score/",
  "source_archived": "https://web.archive.org/web/20251215023345/https://www.eurofins.de/food-analysis/other-services/nutri-score/",
  "official_reference": "Santé Publique France, FAQ Nutri-Score, version 21 Dec 2023",
  "effective_date": "2024-01-01",
  "implementation_date": "2026-07-31",
  "categories_implemented": ["general_food", "beverages"],
  "categories_not_implemented": ["fats_oils_nuts_seeds", "red_meat", "cheese"],
  "reason_categories_excluded": "Insufficient data to correctly classify products into these special categories without ingredient lists or detailed product attributes",
  "input_unit_conversions": {
    "energy_kcal_to_kj": "energy_kj = calories_per_100g * 4.184",
    "sodium_mg_to_salt_g": "salt_g = sodium_mg_per_100g * 2.5 / 1000"
  },
  "grade_boundaries": {
    "general_food": {"A": "≤ 0", "B": "1-2", "C": "3-10", "D": "11-18", "E": "≥ 19"},
    "beverages": {"A": "water only", "B": "≤ 2", "C": "3-6", "D": "7-9", "E": "≥ 10"}
  },
  "algorithm_contract": {
    "verified_against_source": true,
    "source_type": "authoritative",
    "version_uncertain": false,
    "notes": "Algorithm verified against Eurofins page referencing official Santé Publique France FAQ v21.Dec.2023. The GitHub implementation (food-nutrients/nutri-score) uses the PRE-2023 original algorithm and must NOT be used for threshold values."
  }
}