Spirulina is a cyanobacterium, or blue-green algae, sold dried for use as a dietary supplement.
Spirulina is a source of complete protein, B vitamins excluding vitamin B12, iron, copper, manganese, as well as antioxidants. Animal studies have shown benefits of spirulina for immune function and in the treatment of diabetes, obesity, hypertension, and elevated serum cholesterol. Human studies have seen spirulina to be of use in weight reduction and improving cholesterol profiles.
Spirulina is not strictly regulated and supplements may contain other cyanobacteria.
Supplements, Greens powders