Food Allergies
Understanding Food Labels for Dietary Restrictions
How to decode ingredient lists, allergen statements, certifications, and the hidden names for common allergens.
Food labels are your primary safety tool when managing dietary restrictions — and they're more complex than they look. 'Contains' statements and 'May Contain' warnings mean different things. Certifications carry different levels of rigor. And common allergens hide under unfamiliar names. This guide teaches you to read labels with confidence.
The Top 9 Allergens and Where They Hide
In the United States, food manufacturers are required to disclose the top nine allergens: milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, soybeans, and sesame (added in 2023). These must be declared in plain language, either in the ingredient list or in a 'Contains' statement.
The tricky part: these allergens appear under many names in ingredient lists. Some common examples:
- Milk: casein, caseinate, whey, lactalbumin, lactoglobulin, ghee, nougat, half-and-half
- Eggs: albumin, globulin, lysozyme, mayonnaise, meringue, ovalbumin
- Wheat: flour, bread crumbs, bulgur, durum, farro, kamut, semolina, spelt, triticale
- Soy: edamame, miso, tempeh, tofu, natto, soy protein isolate
- Tree nuts (listed individually): almonds, cashews, hazelnuts, macadamia, pecans, pistachios, walnuts
- Peanuts: mixed nuts, peanut flour, peanut oil, artificial nuts (some are reprocessed peanuts)
- Sesame: tahini, sesame oil, gingelly, til, benne
'Contains' vs. 'May Contain'
These two statements describe very different risks, and the difference matters.
'Contains' Statement
A 'Contains' statement is required by law when the recipe intentionally includes a major allergen. 'Contains: Milk, Eggs' means those ingredients are in the recipe. This is not a warning — it's a mandatory disclosure of intentional ingredients.
'May Contain' / 'Made in a Facility'
Advisory statements like 'May contain traces of peanuts,' 'Processed in a facility that also processes tree nuts,' or 'Made on shared equipment with wheat' are voluntary. Manufacturers add them to disclose the possibility of cross-contact during production. They are not regulated, not standardized, and two manufacturers may describe the same level of risk differently.
For mild sensitivities, you may choose to accept the risk. For severe allergies, your allergist should help you develop a policy on advisory statements — there's no one-size-fits-all answer.
Absence of an advisory warning is not a guarantee
A product without a 'may contain' statement isn't necessarily free of cross-contact risk — it may just mean the manufacturer chose not to disclose it. When in doubt, contact the manufacturer.
Certifications Worth Trusting
Third-party certifications provide a higher level of assurance than manufacturer claims alone because they involve independent testing and auditing.
- Certified Gluten-Free (GFFS or GFCO): Products certified by the Gluten-Free Certification Organization (GFCO) are tested to contain fewer than 10 ppm of gluten — stricter than the FDA's 20 ppm standard.
- Certified Vegan: Verifies no animal-derived ingredients. Useful for egg and dairy avoidance, but not a medical allergen standard.
- Kosher (OU-D, OU-Pareve): Kosher 'Pareve' certification means no milk or meat derivatives, making it useful for dairy avoidance. OU-D means dairy. Kosher doesn't address other allergens.
- Halal: Similar to Kosher in that it covers certain production practices. Doesn't directly address common food allergens.
- Non-GMO Project Verified: Unrelated to food allergies.
Hidden Allergens in Unexpected Places
Common allergens turn up in places that seem unrelated to their source ingredient. These are some of the most common surprises:
- Spice blends and seasoning packets often contain wheat or soy as a filler or anti-caking agent
- Deli meats are frequently processed with wheat or soy-based fillers and binders
- Chips and crackers may be fried in shared oil or contain whey powder
- Medications and supplements sometimes use wheat starch as a filler — ask your pharmacist
- Wine and beer: some are fined with egg whites or use wheat in processing
- Candy: many hard candies contain confectioner's glaze made from shellac
- Restaurant cooking sprays may contain soy lecithin
- Some lipsticks and cosmetics contain wheat or nut derivatives
When Labels Change Without Warning
Manufacturers are not required to notify consumers when they change an ingredient, switch production facilities, or add a new allergen to a product. The formula for a product you've used for years can change — and the new package may look almost identical to the old one.
- Re-read labels periodically on products you use regularly
- Be especially alert when packaging looks slightly different — redesigns often accompany reformulations
- Check the manufacturer's website or call their consumer hotline if you're unsure
- When a family member has a reaction to a 'safe' food, check whether the label changed
Frequently asked questions
- Does 'organic' mean allergen-free?
- No. 'Organic' refers to farming and production practices, not allergen content. An organic product can still contain any of the major allergens.
- Is 'wheat-free' the same as 'gluten-free'?
- No. Wheat-free means the product doesn't contain wheat, but it can still contain other gluten-containing grains like barley and rye. Gluten-free means all sources of gluten have been excluded.
- Can a product labeled 'dairy-free' still contain milk?
- Sometimes, unfortunately. 'Dairy-free' is not a regulated term. Look for products that list 'Contains: None of the top allergens' or are certified dairy-free by a third party.