Squidipa, vegemite has a common allergen in it - preservative 220 - google it. There is a website you can go to to check out preservatives etc and that one is written in red writing and it is recommended to limit, or eliminate it for that reason. I actually started a thread about the same thing nearly 12mths ago when my youngest had a milkd rash reaction after his first time with vegemite. He was fine the second time though.