Other names it goes by Corn sugar gum, xanthan, polysaccharide B 1459. What's it used in? Moisturisers, products with a gel texture, toothpaste. What does it do? Xanthan gum acts as a stabiliser and a skin hydrator. Any controversy? It's considered low-hazard, mainly because there have been no major studies on it. The FDA is seeking new toxicology information.