Certain carbohydrates such as mannitol, "laminarin", and alginate can be extracted from "laminaria". Mannitol is used to decrease high intraocular pressure, and to lower excessive intracranial pressure. Laminarin has two forms, soluble and insoluble. The soluble form of "Laminarin" has high antitumor activity, can be used in the treatment of antibiotic-resistant nosocomial infections, can aid in normalizing enteric metabolism, helps to improve enzymatic processes of the intestine and does not possess antigenic or pyrogenic properties. "Laminarin" continues to be of active study in today's medical field.