Nori Seaweed (porphyra) Seaweed contains minerals and trace elements that are very protective and soothing to inflamed or irritated skin. It is a natural antibiotic,high in proteins, iron and phosphorus, vitamins and minerals. Nori Seaweed contains minerals and trace elements that are very protective and soothing to inflamed or irritated skin. It is a natural antibiotic,high in proteins, iron and phosphorus, vitamins and minerals.