What is the difference between a fish, crustacean or shellfish allergy and histamine poisoning?
When someone has a seafood allergy his/her immune system has an abnormal reaction to either fish, crustacean or shellfish proteins. Histamine poisoning is caused by eating fish that contain high levels of histamine, a chemical that forms when certain types of fish start to decompose. High levels of histamine develop when fish, such as anchovies, mackerel, mahi-mahi and tuna, are not properly frozen or refrigerated. Histamine poisoning causes symptoms similar to seafood allergic reactions and can often be mistaken for a fish, crustacean or shellfish allergic reaction. If you are unsure whether you have a seafood allergy or histamine poisoning, consult an allergist or seek emergency medical treatment.
