Posted by: BrandyWineSeattle
« on: December 10, 2015, 02:52:33 PM »I just make sure that it says Calcium Carbonate. That way you know it's not clam shells or anything.....but it usually lists 'may contain' if it is shellfish-derived. Has he been tested? I only ask because I wouldn't think that finned fish allergy would cause allergic reaction to this....but shellfish would (oyster shell calcium, for example).