Soothes mucous lining of respiratory tract Promotes gastrointestinal health 500 mg per capsule Swanson Marshmallow Root is nature’s perfect solution for respiratory and GI tract comfort! For hundreds of years, herbalists have relied on marshmallow root to support the respiratory and gastrointestinal systems, and for good reason. Marshmallow root’s rich mucilage content makes it an excellent choice for soothing mucus membranes that line the respiratory and GI tracts. Our convenient 500 mg capsules make it easy to enjoy the soothing benefits of this time- honored herb.