The future implications for this capability could be miraculous. Astronauts on their way to Mars, or anyone stranded and rationing food supplies could extend their reserves, and redirect psychological energy to the tasks at hand. However, “turning off hunger” is a euphemism away from a anesthetic substitute. If we peer into this hypothetical more darkly, impoverished peoples, whether homeless and domestic or third-world citizens waiting for philanthropic help, may become too reliant, and could potentially die of starvation.
Both scenarios are pure speculation at this early juncture, but history has proved that scientific advancement always also has an ethical dimension.