Researchers, led by Antonio Faciola, looked at a potential dairy cattle supplementary feed made of flaxseed and pea protein. The study was published this month in the Journal of Dairy Science. 

Methane, a potent greenhouse gas, is naturally emitted by cows during digestion, and cows are significant sources of methane worldwide, especially from their burps. When cows’ stomachs make methane, they lose valuable energy that could otherwise be used to make milk or meat. By feeding them in a way that reduces methane output, researchers might be able to help the cow produce more milk while also chasing climate goals.