Sesame allergy — the ninth major allergen, and often the sneakiest
In one paragraph
Sesame allergy can cause severe reactions and, as of 2023, sesame is a federally recognized major allergen in the US with required labeling. It hides in tahini, hummus, many salad dressings, the seeds baked into hamburger and bagel buns, some 'natural flavorings,' and a surprising number of Asian and Middle Eastern dishes.
Why it matters
Sesame is everywhere once you start looking — the bun on your burger, the tahini in your baba ghanoush, the 'everything' seasoning on your bagel, the oil in your stir-fry. Before the 2023 labeling law, severely allergic people had to investigate every dish independently. Now labels help, but cross-contact in bakeries and restaurants remains a risk.
For the guest: script
'I'm allergic to sesame — [severity]. Big watchouts: tahini, hummus, burger buns, the 'everything' spice blend, sesame oil in stir-fries, and bakeries where seeds are everywhere. Happy to bring a side dish that's safe for me so I'm not scavenging at dinner.'
For the host or business
Check the buns, the hummus, the dressings, the baking spices. Skip the sesame-seeded anything for the day. Use olive oil instead of sesame oil in any stir-fry. At a catered event, tell the caterer about sesame specifically — it's the allergen caterers most often forget. For a severely allergic guest, cross-contact at bakeries is a real risk.
Frequently asked questions
- Why is sesame considered a major allergen now?
- Sesame allergy became more prevalent and severe enough to be added as the ninth major allergen under the US FASTER Act, which took effect January 1, 2023. Food manufacturers now must list sesame on labels, the same way they list milk, eggs, wheat, and peanuts.
- Is tahini safe for someone with a sesame allergy?
- No — tahini is pure sesame paste. Anything with tahini (hummus, baba ghanoush, sesame dressings, many halvas) is a direct sesame exposure.
- Does a burger bun without visible seeds have sesame?
- Sometimes. 'Bun stuck to a seeded pan' is enough cross-contact for a severely allergic guest. Ask the restaurant or swap to a seed-free bun from a different bakery.
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