Introducing PuroTetra! The most pure form Tetraselmis Chuii, grown in technologically advanced photobioreactors in Leiria Portugal. It is one of the most ancient & nutritious food sources in the ocean, so small that it’s invisible to the naked eye. These micro-organisms are responsible for creating planet Earth’s atmosphere and allowing life to flourish. People around the world are now experiencing the positive health benefits of Tetraselmis Chuii Marine Phytoplankton. PuroTetra Tetraselmis Chuii offers an Incredible Wealth of Nutrients in a Safe, Bioavailable Manner.