09/01/2026
Seaweed isn’t a silver bullet to mitigating methane emissions from cattle, but it could be an important first step.
Researchers around the world are looking into how seaweed-based feed additives could help reduce enteric methane from cattle. At UC Davis, Dr. Ermias Kebreab, DSc and Dr. Matthias Hess are investigating both the potential of seaweed, and what happens to the rumen microbiome when methane is suppressed.
In grazing beef cattle, one UC Davis study found that the red seaweed, asparagopsis taxiformis, reduced methane emissions by 38 percent. As Dr. Hess put it, seaweed may be an “excellent first step towards the solution” rather than a cure-all itself.
There is still much to learn, but the research is opening new doors to reducing methane.
Full article on PNAS: https://www.pnas.org/doi/10.1073/pnas.2626533123
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