Secondary metabolites chemistry is a main branch of organic chemistry that touches upon many other fields of science, especially applied sciences such as agriculture, health and environment. Involved in the discovery, characterization and cataloging of new chemical substances found in nature. Among other basic scientists,Spirulina , linking bacteria and plants is primitive, has a simple structure but a complex composition. It has been a common dietary substance around the world from ancient times. Although dietary usage and supplementation continues to be popular, there was for a long time no strong scientific evidence of Spirulina's nutritive and health benefits. In recent years, Spirulina has attracted scientific attention, not only for its various health benefits, but also at a micro level of understanding the mechanisms of action of its various components. From being a 'complete' protein source, Spirulina and its components have been shown to have positive benefit across a range of human health indications from malnutrition to antioxidant properties.