I use xanthan gum for thickening sauces and gravies. It also enhances texture of baked goods, so nice to have it in the pantry.

~MsArielle, you can order glucomannan powder from Netrition.com, where I have always ordered mine. A bag will last you a VERY long time, as it is used in such small amounts. or Bob's Red Mill has it, but unless you're fortunate enough to have a grocer with his full line, you'll likely have to order that from his website as well. Some health food stores carry it, as I bought my very first ever from a natural food store. You might even check a Natural Grocers if you have one of those. They just might carry it. Google it for other possible sources.