Spices are aromatic plant products that are used to flavor food and drinks. While spices have little nutritional value themselves, they enhance the pleasure of eating by adding flavor and aroma. Spices are characterized by their pungency, strong odor, and sweet or bitter taste. Some key spices obtained from roots/underground stems discussed in the document include ginger, turmeric, galangal, asafetida, angelica, and horse radish. Spices play an important role beyond flavoring by stimulating appetite and aiding digestion.