What are the health benefits of spirulina?

It is very high in protein; rich in iron, which is great for red blood cells and oxygen transfer, both essential for building a strong body system; has great amounts of vitamin B12, which is essential for a healthy nervous system; beta carotene, an antioxidant essential for growth, vision and mucous membranes; and an array of amino acids and fatty acids, including rare essential fatty acids that can’t be synthesized and are essential for body growth.