Precision fermentation — using microorganisms to produce animal proteins without animals — offers a pathway to dairy proteins, egg proteins, and other animal products with essentially no direct animal welfare impact.
Precision fermentation represents perhaps the most thoroughgoing solution to animal welfare in food production — replacing the animal entirely from the production process. Unlike cultivated meat, which still involves cell donors and ongoing cell culture from animal sources, precision fermentation produces animal proteins using yeast or bacterial bioreactors without ongoing animal involvement beyond initial gene insertion. The welfare implications extend to billions of dairy cows and laying hens if precision fermentation can achieve commercial scale at competitive prices. The technology already exists and products are on market — the limitation is cost and consumer adoption. Investment in precision fermentation technology represents one of the highest-leverage welfare investments in the food system, with potential to eliminate dairy and egg animal welfare harms entirely at scale.