Shellfish/Seafood allergy vs. diet supplement with seaweed in it

[Marcia181]

Can an invidividual take a dietary supplement with Wakame™ seaweed 10% Fucoxanthin who is known to have an allergic reaction to seafood/shellfish that results in anaphylactic shock? Thanks for your response.

[National Jewish Health]

I can see no obvious reason why being allergic to shellfish should predispose to an allergic reaction to seaweed unless it is made in a plant where there is cross contamination of the product with seafood or shellfish.  Since anaphylactic shock is the result there is too much at stake and too little information provided to recommend a dietary supplement with Wakame™.  You should take the product with a list of ingredients to an allergist and get it checked out thoroughly if you plan to take it.  Allergy to shellfish is due to an allergic reaction to a muscle protein called tropomyosin, but is not related to iodine at all.