Spirulina represents a biomass of cyanobacteria (blue-green algae). There are two species, Arthrospira platensis and Arthrospira maxima, which produce pigments called phycocyanin and phycoerthyrin. Phycocyanin is a blue-coloured pigment, absorbing orange and red light, and phycoerthyrin is a red-coloured pigment. Pigments of microalgal origin which are currently enjoying high market demand and spirulina falls into this category!