What is the green in Spirulina?

The green pigments (phytonutrients) in Spirulina are chlorophyll, a term used for several closely related green pigments found in cyanobacteria and the chloroplasts of algae and plants. Its name is derived from the Greek words χλωρός, chloros (“green”) and φύλλον, phyllon (“leaf”). Chlorophyll is an extremely important biomolecule, critical in photosynthesis, which allows plants to absorb energy from light. Chlorophyll absorbs light most strongly in the blue portion of the electromagnetic spectrum, followed by the red portion.
You may have heard a lot of buzz surrounding the healthiness of vegetables, especially leafy green vegetables with deep, rich color tones. In many ways, they’re perfect foods and part of the credit is owed to the chlorophyll they contain. Research also suggests it’s instrumental in promoting good health.