# Gas fermentation for food protein

Upstream — fermentation & cell culture — Food-grade microbial protein grown by hydrogen-oxidizing bacteria on a mix of hydrogen, CO2 and oxygen in gas-loop bioreactors — a land-decoupled "food from air" pathway that reached commercial-demonstration scale by 2026.

Source: https://en.bioecon.ru/market/upstream/gas-fermentation-food-protein/