Spirulina under the microscope (IMAGE) University of Utah Caption Spirulina under a microscope. Lumen Bioscience researchers engineered spirulina to biomanufacture a natural enzyme that they've shown destroys methanogens, the microbes in cows' rumen that produces methane gas, within minutes. The lysin-containing spirulina are so effective at killing methanogens that adding a tiny amount to the cow’s diet is enough to make them methanogen-free. Credit Lumen Bioscience Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. Adaptations must be shared under the same terms. License CC BY-NC-SA Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.