Nature's Sunshine Goldenseal provides goldenseal root extract, a concentrated form of a traditional North American herb. Goldenseal is commonly used for mucous membrane support, especially in the digestive and upper respiratory tracts. The plant compounds most often discussed in goldenseal are alkaloids such as berberine and hydrastine.
Because this is an extract, the product is more concentrated than plain powdered root. Goldenseal is usually chosen when you specifically want goldenseal's traditional role in digestive and mucosal support. Before buying, the key detail is that it is a focused single-herb extract rather than a broad herbal blend.