<<Disclaimer: Verify this information before applying it to your situation.>> Thanks, everyone, for such quick replies. Following are excerpts of the replies I received. Generally, while canola (rapeseed) is GF in and of itself, it is grown in rotation with wheat (one year wheat, next rapeseed, next wheat, etc.). Therefore, the possibility of cross contamination. In addition, it contains a particle of protein that many people seem to be sensitive to. So while it may be GF, some people may have a reaction due to sensitivity. Hope this helps! Because canola or rape seed is grown in resting wheat fields and at times volunteer wheat plants grow up among the canola plants and then are harvested along with the canola, so its impossible to say that canola oil is uncontaminated by wheat. However, most people do not have a problem with it. The theory is that wheat is grown in fields in rotation with canola. Some people feel there is a risk of contaminatin during harvest. As I understand it, canola is gluten-free. It is made from rapeseed and contains a particle of protein (the name I can't remember and I can't find the source to quote) that some people are sensitive to, thus the CSA has listed it on the "don't eat" list. . . . . If people react to canola oil it is not because of the gluten but because of sensitivity to that particular protein. Basically canola oil is derived from canola or rape crops primarily in Canada. This crop sometimes is grown in fields that were previously wheat, therefore there is some thought of cross contamination. Because it is grown on wheat fields (rotation crop). It is contaminated while growing.