Spirulina is a nutrient-rich superfood with various health benefits. Spirulina is a type of algae, specifically a cyanobacterium, that grows in freshwater lakes and ponds. Spirulina contains up to 70% protein by weight.Rich in Vitamins Spirulina is a good source of vitamins B12, E, and K.Spirulina contains minerals like iron, calcium, and potassium.Antioxidant PropertiesSpirulina has antioxidant properties due to its high content of phycocyanin.