Spirulina is a genus of blue-green algae used as a nutritional supplement. Blue-green algae, which are microscopic fresh-water organisms, are also known as cyanobacteria. Their color is derived from the green pigment of chlorophyll, and the blue from a protein called phycocyanin

Spirulina is a genus of blue-green algae used as a nutritional supplement. Blue-green algae, which are microscopic fresh-water organisms, are also known as cyanobacteria. Their color is derived from the green pigment of chlorophyll, and the blue from a protein called phycocyanin