https://www.mayoclinic.org/drugs-supplements-glucosamine/art...
> In supplement form, glucosamine is harvested from shells of shellfish or made in a lab.
The hives might be a shellfish allergy.
> In supplement form, glucosamine is harvested from shells of shellfish or made in a lab.
The hives might be a shellfish allergy.
I considered this too, but never had problems eating shellfish. Tho it's possible that in higher quantities the allergens from shellfish were indeed the cause.