Originally Posted by not on the rug
Flour is often added as an anti-caking agent since dried peppers tend to stick together in packaging. I wouldn't buy one with wheat flour used as an anti-caking agent, but if they used, say, corn starch (like in pre-shredded cheeses) I wouldn't worry about it because it is such a tiny quantity.
I cook regularly with potato starch and tapioca starch, so any quantity of them wouldn't bother me.
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