A major cyanobacterial food source used in many parts of the world is

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Spirulina is a major cyanobacterial food source used in many parts of the world. It is a type of blue-green algae that is high in protein and various vitamins and minerals. It is commonly used as a food supplement and can also be added to other foods like smoothies, salads, and baked goods. Anabaena, Rhizobium, and Gymnodinium are also types of cyanobacteria, but they are not commonly used as a food source for humans.

A Major Cyanobacterial Food Source Used in Many Parts of the World