Edible gold leaf is a gold product that can be used to decorate food. Gold is considered "biologically inert," meaning it passes through the digestive tract without being absorbed. It is mostly used in desserts and candy making and is available in sheets and as flakes. It is one of the world's priciest foods, but considering it is real gold, the sheets and flakes are relatively inexpensive. It is important to buy quality gold leaf as cheaper versions contain impurities.