Spirulina is a type of blue-green algae that contains several nutrients, including B vitamins, beta-carotene, and vitamin E. Spirulina also contains antioxidants, minerals, chlorophyll, and phycocyanobilin and is commonly used as a source of vegan protein. Spirulina has been consumed for centuries due to its high nutritional value and supposed health benefits. Dried spirulina contains upto 60% protein and various other nutrients.