1 is the algal body of gracilariaceae. Gracilaria lemaneiformis is rich in seaweed polysaccharide, iodine, calcium, iron and other essential elements and vitamins A, B1, C, etc. Fucoidan is the main component of the outer layer of the algae, which can effectively remove bacteria and 1-157 Escherichia coli on the surface of gastric mucosa. Japanese studies have proved that it has the effects of clearing lung and defecating, nourishing face and slimming, lowering blood pressure and blood lipid and regulating body function. The traditional consumption of Nostoc flagelliforme is the main reason why the life expectancy of Okinawa people in Japan is the highest in the world. So Shuiyun has a reputation as a longevity dish in Japan. It has a wonderful effect on clearing lung and intestinal toxins and removing garbage from the body. Regular consumption can balance the internal environment and ensure smooth excretion. It is the most ideal natural marine health food for women to lose weight and beauty and for middle-aged and elderly people with habitual constipation. It has the functions of clearing away heat, detoxifying, resolving phlegm and moistening stool. Regular consumption of Nostoc flagelliforme can transform toxic organic matter into non-toxic substances, which can purify blood and prevent cancer.

Economic value of Gracilaria lemaneiformis: it is not only the superior raw material for extracting agar in food industry, but also can be used as high-quality feed for abalone breeding and green health food for human beings. Agar can be used as thickener, coagulant, suspending agent, emulsifier, stabilizer, preservative, adhesive and biological medium. Agar is widely used in making granular drinks, rice wine drinks, fruit juice drinks, crystal soft sweets, sheep soup, lunch meat, ham sausage, jelly pudding, ice cream, flower cake, eight treasure porridge, cold dishes and so on. Agar is used in toothpaste, shampoo, facial cleanser, cosmetics and solid fragrance in daily chemical industry. It is also widely used in medical research.