F. metalis is a lithotropic strain that produces abundant siderophores when it is supplied with an iron substrate. The iron is enzymatically reduced and binds metabolically synthesized heme, which is then exported in lipid vesicles. These stable vesicles can be used in direct transfusion to serve as a temporary substitute for lost blood. Since it is unfeasible to chemically manufacture these molecules on a scale necessary to replace volumes of human blood, F. metalis was a great advancement for human health and trauma care. When an individual receives such a transfusion, they are frequently able to perform feats of endurance and stamina far beyond normal human capability for a brief period.