Nature's Sunshine Golden Seal 525mg 100cGolden seal, often called the King of mucous membranes is traditionally used to help soothe the mucus membranes that line the respiratory, digestive and urinary tracts and has been written about from the 16th century when pioneers encountered Native Americans chewing it for their mouth ulcers. Golden seal has anti inflammatory, astringent and immune supporting properties. It is most useful when taken at the first sign of respiratory symptoms or colds.