Super Green Clean - almost raw Spinach, Watercress & Leek Soup with Garlic & Spirulina Spirulina is a clever little single celled algae that is a dense source of veggie protein, as well as myriad different other nutrients, including thyroid -protecting iodine. Fact is though, it doesn't taste that great, so you have to add it things that do taste great and hope for the best. This is one way to - forgive the California speak - to totally max your greens in one swift move,