A type of blue-green algae, spirulina contains a number of nutrients, including B vitamins, beta-carotene, and vitamin E. High in protein (it's often used as a vegan source of protein), spirulina also contains antioxidants, minerals, chlorophyll, and phycocyanobilin.  

A type of blue-green algae, spirulina contains a number of nutrients, including B vitamins, beta-carotene, and vitamin E. High in protein (it's often used as a vegan source of protein), spirulina also contains antioxidants, minerals, chlorophyll, and phycocyanobilin.