The efficacy of shellfish is very much, the rational use of the body will be beneficial. Its more significant are as follows: 1. Cough suppressant, expectorant effect. Shellac is a Chinese medicine with a bitter taste. Can not be directly eaten, if there is a cough or phlegm symptoms, you can use the mother of pearl in the cough expectorant.2. The effect of blood pressure. The use of shellfish can be carried out to reduce blood pressure.3. Shellfish also has efficacy on blood sugar. Extracts of the mother-of-pearl can improve normobaric and hypoxic capacity.4. The efficacy of the smooth muscle is also very significant.