Shellfish
How to Read a Label for a Shellfish-Free Diet
All FDA-regulated manufactured food products that contain a crustacean shellfish as an ingredient are required by U.S. law to list the specific crustacean shellfish on the product label.
Avoid foods that contain shellfish or any of these ingredients:
- barnacle
- crab
- crawfish (crawdad, crayfish, ecrevisse)
- krill
- lobster (langouste, langoustine, Moreton bay bugs, scampi, tomalley)
- prawns
- shrimp (crevette, scampi)
Mollusks are not considered major allergens under food labeling laws and may not be fully disclosed on a product label.
Your doctor may advise you to avoid mollusks or these ingredients:
- abalone
- clams (cherrystone, geoduck, littleneck, pismo, quahog)
- cockle
- cuttlefish
- limpet (lapas, opihi)
- mussels
- octopus
- oysters
- periwinkle
- scallops
- sea cucumber
- sea urchin
- snails (escargot)
- squid (calamari)
- whelk (Turban shell)
Shellfish are sometimes found in the following:
- bouillabaisse
- cuttlefish ink
- fish stock
- glucosamine
- seafood flavoring (e.g., crab or clam extract)
- surimi
Keep the following in mind:
- Any food served in a seafood restaurant may contain shellfish protein due to cross-contact.
- For some individuals, a reaction may occur from inhaling cooking vapors or from handling fish or shellfish.



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