Spirulina is a natural plant and the most popular green food, which has become the first choice for health care workers. Spirulina is rich in nutrition, which is called super nutrition package and plays a great role in enhancing human immunity. As a popular green food, Spirulina has made great contributions to human health. Its protein content is as high as 75%, its amino acid composition is very orderly and reasonable, and it contains almost all kinds of essential amino acids needed by human body, so it is a popular green food. Spirulina is rich in vitamins, polysaccharides, unsaturated fats and minerals, and is called "super nutrition package" prepared by nature for human beings.