Sometimes products labeled as edible glitter and edible luster dust will contain the same ingredients—muscovite and other FDA-approved powders and coloring agents. Edible glitter might also be made out of a variety of other ingredients, like gold and silver. It's important to note, though, that not all luster dust and glitter are edible and that is because they can contain a long list of ingredients that are not considered to be food-safe. Some glitter products that are likely situated on a shelf near their edible counterpart, will be made of shiny specks of plastic. Be wary of products that are listed as "non-toxic" or "for decorative purposes only". The occurrence of those phrases on a label are usually indicators of products that are not edible.