‘Contains’ Versus ‘May Contain’: What Each Food Label Statement Tells You

First find the ingredient declaration

An allergen intentionally used in a food belongs in its ingredient and allergen declarations under applicable law. Australia and New Zealand require plain English declarations for specified allergens and a nearby 'contains' summary on applicable packaged food. In the United States, FDA-regulated foods can identify a major allergen's source in the ingredient list or in an adjacent 'Contains' statement. The label format depends on the market. ^{[1, 2]}

Read the whole ingredient list even when a bold summary is present. A compound ingredient such as a sauce or seasoning can have its own sub-ingredients. Platesafe's ingredient directory can help you research an unfamiliar name, but the exact pack is the current product evidence.

For foods sold unpackaged, ask the supplier for allergen information. FSANZ says this information must be displayed with the food or made available on request in Australia and New Zealand; rules elsewhere differ. ^[1]

Understand what 'may contain' is for

A 'may contain' or similar precautionary statement concerns possible unintended allergen presence, such as cross-contact during manufacture. FSANZ says these statements are voluntary and are not regulated by the Australia New Zealand Food Standards Code. FDA likewise describes advisory statements as voluntary and says they must not substitute for good manufacturing practices. ^{[1, 2]}

UK government guidance advises businesses to use precautionary labelling when a risk assessment finds cross-contact that cannot be removed through risk management. That describes UK guidance for businesses; it is not a universal rule for every country or product. ^[3]

A precautionary line does not tell you the amount present in an individual pack. FDA notes that different advisory wordings do not reliably rank the likelihood or level of allergen presence. ^[4]

Do not reverse the meaning of a missing warning

Because precautionary allergen labelling is voluntary in Australia, New Zealand and the United States, its absence cannot be treated as a certified zero-risk claim. FSANZ's health-professional guidance says products with and without such statements should not be ranked by that line alone. ^{[1, 4, 5]}

If you need to know how a product's cross-contact risk was assessed, contact the manufacturer with the exact product and lot details. Ask about the ingredient you avoid and the current manufacturing process, rather than assuming an older pack or a similar flavour answers the question.

Keep your own clinician's advice on precautionary statements separate from what the label is legally required to say. This guide explains information, not a personal risk threshold.

Watch for changed products and imported packs

Ingredients and allergen statements can change without a packaging redesign. FSANZ advises consumers and health professionals to read the entire product label every time a pack is purchased. ^[5]

For an imported food, identify the market whose label you are reading and look for any compliant local label or sticker. If a translation, sticker or online listing conflicts with the physical pack, ask the seller or manufacturer before relying on it.

A personal ingredient notebook can record the brand, variant, photograph, date and unresolved question. Keep yesterday's answer attached to yesterday's pack.

Ask a useful manufacturer question

A focused question is: 'For this exact product and lot, is [name the food] an ingredient or component of any ingredient? Is there a current precautionary allergen statement, and what manufacturing information can you provide about possible cross-contact?'

The answer may be limited, and it may change with a supplier or process. Record who answered and when. If the information remains inadequate for your needs, use your individual medical advice to decide on another product.

Keep the two statements in separate columns

When comparing products, write one line for declared ingredients and one for possible unintended presence. A 'contains' line is about a food used in the product; a 'may contain' line is a precaution about possible cross-contact. Neither line by itself is a full assessment of the current pack, and label law varies by country. ^{[1, 2, 3]}

Use the restaurant question guide for meals prepared at a venue: packaged-product labels and restaurant kitchen handling are different kinds of evidence.