Chlorella is a green single-celled microalgae that has naturally occurring chlorophyll, plus beta-carotene, mixed carotenoids, vitamin C, iron and protein. Naturally occurring Chlorophyll & Beta-Carotene, Broken Cell Wall Algae. The cell wall in this high quality chlorella has been broken down mechanically to aid digestibility. NOW Chlorella delivers the natural nutrient profile found in genuine whole foods.