Xanthan gum is commonly used as a gluten-free food additive. It is a sugar-based compound, or polysaccharide, that is often used in common foods like salad dressing. Xanthan gum is considered a byproduct of decomposing foods, and is sometimes likened to fermented foods like vinegar and yeast. Because of its viscous composition and texture, Xanthan gum is also used as an adhesive agent in many personal care products in order to bind non-mixing ingredients (such as oil and water). The Environmental Working Group (EWG) classifies xanthan gum as a non-toxic emulsifier and ‘skin-conditioning agent.’ It is also noted to improve the shelf-life of numerous products.