German food tech startup Formo has obtained self-affirmed GRAS (Generally Recognized as Safe) status in the US for its precision-fermented αS1-casein, the most abundant protein fraction in cow's milk, enabling sales to American food manufacturers. Formo engineers a food-grade E. coli strain to express recombinant αS1-casein in stirred-tank bioreactors, producing a single, characterised protein fraction after cell lysis, separation, and purification, with no living microorgani