Naturally occurring Chlorophyll & Phytonutrients Broken Cell Wall Algae Chlorella is a green single-celled microalgae that has naturally occurring chlorophyll, plus other phytonutrients. 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. Natural color variation may occur in this product. This product is sold by weight not volume.