Spices mainly refers to the dried powder or essential oil of aromatic plants used in food flavoring. Humans began in ancient times, some of the stimulating aromatic plants as medicine for food, their essential oil content is high, there is a strong flavor, aroma effect, not only can promote appetite, improve the flavor of food, but also bactericidal antiseptic function. Nowadays, spices not only have powdered, but also essential oils or oleoresin form products. Spice, also known as spice or allspice, is a general term for a number of dried plant seeds, fruits, roots, and barks made into flavorings, such as pepper, cloves, and cinnamon. They are primarily used to add flavor to food rather than provide nutrition. Some of the plants used for flavoring are also used for medicinal, religious, cosmetic, aromatic, or edible purposes. Spices are seldom used alone, and most are made up of dozens of ingredients blended together. Sometimes, spice also refers to the material used to make the flavor.