Chlorella, along with wheat grass, barley grass and spirulina, are sometimes referred to as green foods. There are several species of chlorella.

Chlorella is a protein containing super food, also containing DNA and RNA. Through a special process, the chlorella cell walls have been cracked to ensure maximum nutrient availability and uptake in the digestive tract.

Those most commonly used in nutritional supplements are Chlorella vulgaris and Chlorella pyrenoidosa. Chlorella is rich in protein.