Guar gum is the endosperm of the guar bean plant. It is unrelated to soy except for the fact that they like peanuts and beans are legumes. If soy is added to a product that contains guar gum then it will have to listed separately on the food label.
If you trace this statement you referred to back to the original web site referred to in the article you will find it says "The following ingredients may indicate soy:" and then they list guar gum, gum arabic (acacia) and vegetable gum. These products do not contain soy and if it is added it has to be listed separately on the label. It shows that you cannot trust everything you read on the web.
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Re: What ingredient in this bread is likely causing me trouble?..
