Carrageen is a type of SEAWEED, also known as Irish moss, which is commonly used as a thickening agent in food products. It is harvested from the ocean and is composed of red algae, which is why it is sometimes referred to as 'Irish moss'. Carrageen has been used for centuries as a natural remedy for digestive issues, and is now widely used in the food industry as an emulsifier and stabilizer. It is also used in cosmetics and pharmaceuticals.