Cyanotech Corp. engages in the cultivation, production, and sale of natural products derived from microalgae for the health and human nutrition markets worldwide. Its products include BioAstin Hawaiian Astaxanthin, a dietary antioxidant, which is used as a human dietary supplement and dietary ingredient to support and maintain the body's natural inflammatory response, enhance skin, and support eye, joint, and immune health, and Hawaiian Spirulina Pacifica, a nutrient-rich dietary supplement that is used for extra energy, a strengthened immune system, cardiovascular benefits, and as a source of antioxidant carotenoids. The company was founded by Gerald R. Cysewski in 1983 and is headquartered in Kailua-Kona, HI.