answer:
cobolt
Step-by-step explanation:
Cobalt has the least requirement a day for an individual, at only 0.0015mg for both men and women. It can be obtained from fish, nuts and green leafy vegetables. Cobalt is utilized in the body to nourish digest and process vitamin B12. In extension, cobalt serves to treat diseases such as anemia and several dangerous diseases. Cobalt also helps in repairing of myelin, which surrounds and guards nerve cells. It serves in the production of hemoglobin (red blood cells).