Reading food labels for allergens
Updated October 2026 · 2 min read
Quick answer
Look for the Contains line and read the full ingredient list. Check again each time, because makers change recipes.
Two places to look
The Contains statement near the ingredients, and the full ingredient list itself.
Words that mean an allergen
Casein and whey mean milk. Albumin means egg. Tahini means sesame. Semolina and farina mean wheat.
Shared equipment
Some foods are made on shared equipment. That warning is voluntary, so call the company if you need to know.
Store brands change
Store brands can switch suppliers. Check labels again.
Take a photo
Photograph the label of a food your family relies on, so you can compare next time.
This guide is general food planning, not medical advice. Your care team knows your situation best.
Why does the label matter so much?
Recipes change without notice. A snack that was safe last month may now share a line with nuts or contain milk powder. The label is the one place that tells you what is in the package today.
Where do you look?
Look in two places: the Contains statement, usually just below the ingredient list, and the full ingredient list. Both should agree. If they do not, do not buy it, and tell the store or the maker.
What words mean an allergen?
| Word | Allergen |
|---|---|
| Casein, whey, lactose, ghee | Milk |
| Albumin, lysozyme, meringue | Egg |
| Semolina, farina, spelt, durum | Wheat |
| Tahini, benne | Sesame |
| Lecithin, edamame, miso, tofu | Soy |
| Pesto, marzipan, praline | Tree nuts or peanuts, often |
| Casein, whey, lactose, ghee | Milk |
| Albumin, lysozyme, meringue | Egg |
| Semolina, farina, spelt, durum | Wheat |
| Tahini, benne | Sesame |
What do "may contain" statements mean?
These warnings are voluntary in the United States. Some products carry them and some similar products do not, even if they were made the same way. If your allergy is severe, call the maker and ask about shared equipment and shared lines.
What about foods without a package?
Bakery items, deli foods, restaurant meals and bulk bins may not have a full label. Ask the staff to show you the ingredient list, or choose a packaged item you can read.
How do you teach a child to read labels?
Start with the pictures and the Contains line. Ask older children to check the label with you before they eat something new. A child who reads labels is safer at parties and school.
How often should you check?
Every time you buy, and again when you open it at home if the package looks different. Keep a short list of brands you trust, and recheck them from time to time.
Who should you ask?
Your allergist or dietitian can help you understand what to look for. This guide is general information, not medical advice. Ask your doctor, dietitian or allergist about what is right for you.
Frequently Asked Questions
Practice varies. Always tell the restaurant about your allergy and ask.
No. Rules differ by country. Check local rules when you travel.
No. A product can be gluten-free and still contain milk, eggs or nuts. Read the full label.
Check the label and the maker's allergen policy. If you are still unsure, call them.