Coriander seed is generally used coarsely ground or more finely powdered, depending on the texture desired. It is best bought whole as, being brittle, it is easy to mill or pound in a mortar. Ground coriander is apt to lose its flavor and aroma quickly. The most common use of coriander seed is in curry powders. Coriander is an ingredient of garam masala, pickling spices. Coriander seed oil is an aromatic stimulant, a carminative (remedial in flatulence), an appetizer and a digestive stimulating the stomach and intestines. It is generally beneficial to the nervous system.