Dried seaweed moldy even after washing is not recommended for consumption. Dried seaweed is rich in nutrients, such as protein, carbohydrates, dietary fiber and trace elements, etc., moderate consumption is beneficial to human health, but if the dried seaweed has deteriorated, mold is not recommended for consumption. Dry kelp moldy, can not be consumed, mainly because the dry kelp grows white mold, indicating that deterioration has occurred, there are more mold growth, consumption will produce gastrointestinal tract stimulation, abdominal pain, diarrhea, nausea, vomiting and other manifestations. And even if the mold is washed off the surface, it is not recommended to consume it, because there may also be mold inside the dried seaweed that cannot be observed with the naked eye. The white frost on the surface of dried kelp does not belong to the phenomenon of mold and deterioration, it is due to the formation of plant alkali by weathering, the substance will not harm the human body. It should be noted that the distinction, a number of kelp itself does not have any deterioration phenomenon, after washing can be normal consumption. In addition, in the daily should be placed in a dry and ventilated environment to prevent deterioration.