Meets Good Superfoods from the Source USDA Kosher Vegan Certified by CCOF Superfood Your Day! Spirulina, also known as blue-green algae, was used by the ancient cultures as a daily food source. This powder offers an excellent source of protein and iron and it is also a good source for Vit B6. Spirulina The Original Superfood Spirulina has been used for thousands of years, for its high concentration of functional nutrients. Our spirulina powder can be added to smoothies and meals for a natural immune system boost.