Chlorella is single-celled blue - green algae. It is a microscopic organism that grows in fresh water. Its rich green color comes from its high concentration of chlorophyll. Chlorella is a nutrient-dense superfood, rich in protein, vitamin A, vitamin B2, vitamin B3, iron, magnesium, zinc, and more. It detoxifies the body and supports the immune system. Raw Nutrition carries Raw, Organic Chlorella of the highest quality available.