Size:8 Ounce Bob's Red Mill Guar Gum is a unique, vegan gluten free thickener. It made from the seeds of the guar legume, which have been ground into a fine powder. It is used as a thickener in gluten free baking and cooking. Like all of our gluten free-labeled products, this product is processed in a dedicated gluten free facility and R5-ELISA tested to confirm its gluten free status.