Spirulina, a single celled micro algae grown on soda lakes, is a rich source of beta carotene, vitamins and amino acids and is the earth's richest source of protein. It contains approximately 60% protein as compared to raw meat at 27% and soya beans at 34%. In addition it is the world's highest known vegetable source of Vitamin B12, as well as high concentrations of Vitamins A, B1, B2, D, E and K

Spirulina is a blue-green, coarsely ground powder.