The artificial blood is created by extracting hemoglobin — a protein containing iron that facilitates the transportation of oxygen in red blood cells — from expired donor blood. It is then encased in a protective shell to create stable, virus-free artificial red blood cells. As these artificial cells have no blood type, there is no need for compatibility testing. The synthetic blood can reportedly be stored for up to two years at room temperature and five years under refrigeration.
At scale it’d probably be cheapest to just gin up some yeast that produces it. They were probably using expired blood for research purposes because they had easy access
Yeah it’s better to solve the blood substitute problem first. Then if it works look at better ingredient creation.