Chlorella, a small green algae, is grown in fresh water. It has become a popular food supplement in Japan and the United States due to its high nutritional value. Chlorella is one of the most abundant sources of chlorophyll. It contains 19 amino acids, beta-carotene, vitamin B-12, iron and protein. It is known to be one of the highest sources of RNA and DNA. Chlorella contributes to overall health and wellness.