Star anise contains anethole, the same ingredient that gives the unrelated anise its flavour. It is widely grown for commercial use in China, India, and most other countries in Asia. Star anise is an ingredient of the traditional five-spice powder of Chinese cooking. It is also a major ingredient in the making of pho, a Vietnamese noodle soup. Star anise has been used in a tea as a traditional remedy for rheumatism, and the seeds are sometimes chewed after meals to aid digestion.