Spirulina is a cyanobacterium, or blue-green algae, sold dried for use as a dietary supplement.

Health considerations

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.

Keep in mind

Spirulina is not strictly regulated and supplements may contain other cyanobacteria.

May be found in

Supplements, Greens powders


Il Farmaco
Journal of Nutritional Science and Vitaminology
Nutrition Data
Journal of Nutritional Science and Vitaminology 2
Journal of Applied Phycology

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