Grapeseed oil is extracted from the seeds of grapes, typically wine grapes. Since grape seeds are usually discarded as part of the wine making process, the extraction and sale of grapeseed oil can be a profitable sideline, as well as an efficient use of a byproduct. In the twentieth century, grapeseed oil began to be processed and sold in much higher volume, primarily in the United States and Europe. Many stores sell pure grapeseed oil for various applications.