Cellulose may be used in foods as a hydrocolloid. As a vegetable gum, it serves a major role as a stabilizer. Cellulose is also frequently used as a fat replacer or substitute. In foods, the cellulose ingredients are insoluble fibrous particles that are capable of holding water and suspending the dispersed particulates. It can replace fat because it gives an appropriate mouth feel and lends a glossy opaque appearance when used. Cellulose is an excellent source of insoluble fiber. Unlike soluble fiber, insoluble fiber does not feed bacteria well and is not readily fermented into short chain fatty acids.