Map every relevant statement to its location

Allergen-related information can appear in the ingredient list, a contains statement, parentheses after an ingredient, an advisory statement, a free-from claim, a certification mark, or manufacturer support material. Capture each item separately with verbatim wording and panel location. Do not merge several statements into a new summary that the package does not make. A clear record lets readers distinguish declared ingredients from voluntary or precautionary language.

Begin with an exact package match: product name, variant, format, count or net quantity, market, and visible lot or revision cues. Retailer text can lag behind a redesigned label or refer to a different flavor. Archive the manufacturer or package image and record access date. When only a seller statement is available, label it seller-provided and avoid presenting it as a verified package declaration.

Keep contains and advisory language separate

A contains statement and wording such as made in a facility or may contain do not occupy the same documentary category. Preserve the exact verbs, named substances, punctuation, and qualifiers. Do not convert advisory language into a definite ingredient declaration, and do not interpret absence of an advisory statement as proof that no cross-contact is possible. The database should support multiple statement types rather than one yes-or-no allergen flag.

Ingredient-derived source wording may also matter to a label review. Record the full ingredient and other-ingredients lists rather than extracting only familiar allergen terms, because legal names and disclosure conventions vary. Automated matching can flag text for human review, but it should not decide that a package is acceptable for an individual. Spelling variants, compound ingredients, translations, and packaging changes all require package-level verification.

Treat free-from wording as a scoped claim

Claims such as free from, no added, does not contain, or made without should be quoted exactly and tied to the named substance and product variant. Do not expand a claim beyond its wording. A package that names one substance has not necessarily made a broader claim about related substances, processing aids, facilities, or every market version. Store whether the statement appears on the package, manufacturer page, certificate, or seller listing.

A free-from badge can have conditions defined by its owner or by applicable law. If the badge belongs to a certification program, link to the issuer’s public directory and criteria when available, while keeping the package claim separate from registry verification. A visual logo alone should not be described as current certification until the exact product or company listing and scope are confirmed. Record verification date and unresolved mismatches.

Compare labels without issuing a safety conclusion

A neutral table can compare declared ingredient lists, contains statements, advisory statements, free-from wording, certification marks, source types, and capture dates. It should display exact text or an accessible expansion, not reduce the result to safe or unsafe. Personal safety can depend on details that a public label image does not resolve, including formulation changes, manufacturing controls, and individual circumstances.

Absence is especially easy to overstate. Use not found on reviewed panels rather than contains none when a term does not appear. Specify which panels and image version were checked. If one source shows advisory text and another does not, retain both and mark a source conflict. The manufacturer or relevant authority is the appropriate source for current package-specific clarification; MIHEN should not settle the conflict through inference.

Maintain a revision-aware evidence record

Label claims and ingredient statements can change, so retain prior captures with timestamps instead of silently replacing them. A review queue should trigger when a package redesign, flavor change, new seller image, recall notice, or manufacturer update appears. Require two-person review for negation words such as no, not, and without because losing one word reverses the meaning. Optical character recognition output should never be the sole evidence for small advisory text.

Publish the narrow scope prominently: the page reports label statements observed on a named package at a stated time. Include an accessible and independently reviewed text transcript beside imagery so qualifiers are searchable without hiding the original evidence, and label cropped images when adjacent context is unavailable. It does not diagnose an allergy, assess an individual’s risk, guarantee absence, or select a product. This boundary is not boilerplate; it follows directly from the incomplete and version-sensitive nature of packaging evidence. The useful outcome is a precise source map that a reader can verify, not an unsupported personal conclusion.

  • Match all evidence to the exact product variant and market.
  • Capture ingredient, contains, advisory, and free-from text separately.
  • Preserve qualifiers, negation, punctuation, and panel location.
  • Identify whether each claim comes from the package, manufacturer, issuer, or seller.
  • Verify certification marks in the issuer’s public directory when possible.
  • Use not found on reviewed panels instead of claiming absence.
  • Retain conflicting and historical source versions.
  • Avoid safe-or-unsafe conclusions or personal recommendations.

Limitations

  • A public label image may be incomplete, outdated, or too low-resolution for small text.
  • Absence of a statement is not proof of absence of a substance or cross-contact risk.
  • Certification and free-from claims can have scope conditions not visible on the front label.
  • This guide does not determine individual safety or replace current package verification.

MIHEN / Sources

Sources

Sources mapped to the sections in this guide.

  1. Food AllergiesU.S. Food and Drug Administration
  2. 21 CFR 101.4: Food; Designation of IngredientsElectronic Code of Federal Regulations
  3. Food Allergen Labelling and Information RequirementsUK Food Standards Agency