Third in our “Pet Food Ingredients to Avoid”, written by Laurie Goldstein, is guar gum, another thickening agent. Guar gum is also a polysaccharide, but unlike xanthan gum – a product of bacterial fermentation produced in a lab – guar gum is derived from an actual food: the guar bean, or Indian cluster bean. These are the seeds of the Cyamopsis tetragonoloba tree that grows primarily in India and Pakistan. These seeds look similar to green beans and the food additive produced from them looks similar to flour.

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