<<Disclaimer: Verify this information before applying it to your situation.>> WOW. I am overwhelmed by the number of responses and the care and concern some of you expressed. And to summarize, without a doubt vomiting is a symptom of gluten ingestion, with or without other symptoms. Thank you ALL for your helpful and caring emails. [and to reassure some of you that we are all "OK" here: my oldest daughter is the diagnosed celiac, and her youngest sister, who favors her remarkably, rarely gets gluten, but it appears that when she does (either eating it herself, or through my breastmilk), she is now reacting to it, by vomiting] Jennifer G