<<Disclaimer: Verify this information before applying it to your situation.>> Thanks to everyone who responded. Most of the responses were to say that folks had a positive experience with Trader Joe's staff and that they were well informed. Unfortunately, no one actually knew the answer :-( The good news is, that even though I didn't get a good feeling from the guy in the store, he did call me back with the info today. RiceUm is NOT GF since they use barley enzymes. Guess we'll have to find something different. Kathy in N. CA