Spirulina is the common name for two species of cyanobacteria, or blue-green alg . Many consider this plant nature's most powerful ""green"" food. Strong, grassy with a pungent sea flavor, Frontier Organic Spirulina Powder can be used in smoothies, seasoning mixes, green sauces, hummus, meatballs and even brownies. Our organic bulk spirulina is kosher certified and non-irradiated.