Irish moss is used as a natural thickener as it has a high carrageenan content, a vegan gelatine alternative.
It is widely sold in its dried, whole form, often marketed as “sea moss” or “carrageen moss”. It is very high in nutrients, with essential minerals like iodine, calcium, potassium, magnesium, iron, vitamins A, C, E, K, fibre and antioxidants.