Nepotism has very high economic value and medicinal value, not only contain rich protein, vitamins and minerals, also contain algin, mannitol, alginic sugar gum, high unsaturated fatty acids, fucus flavin, organic iodine compounds, sterols, dietary fiber, and other unique physiological function, the active ingredient. Have fall hematic fat, fall blood pressure, immune regulation, resistance mutation, antitumor and other biological activities. Have many pharmacological effects, antiviral, antitumor, fall blood pressure, weight, and cardiovascular diseases treatment and so on has the very good effect.