- Swanson Premium Brand Saffron Herbal Supplement - Contains whole milled stigmas of the highest quality Spanish saffron - Its use in health care dates back to ancient times. Saffron is widely known as one of the most expensive spices in the world. Commonly associated with Persian cuisine, it is grown primarily in Iran, Spain, and India. In addition to its use as a spice and coloring, saffron has a history of use in health dating back to ancient times. Today, saffron is enjoying renewed interest within the medical research community and the studies supporting its use are rapidly accumulating. Our Swanson Premium brand saffron capsules contain whole milled stigmas of the highest quality Spanish saffron.