In a nutshell:
Cobalt is a component of vitamin B 12 and an enzyme activator.
The body contains 1 to 1.5 mg of cobalt. The main storage organ is the liver. Cobalt is a component of vitamin B 12 (cobalamin) and it can activate a series of enzymes. Cobalt is only vital as a component of vitamin B12. The cobalt requirement is covered by the intake of vitamin B12.
Requirement, deficiency and oversupply:
The amount of cobalt in vitamin B12 seems to be the sufficient amount for the human body.
There are no known cases of cobalt deficiency.
Cobalt, like nickel, can cause allergies. An excessively high intake of inorganic cobalt may damage the heart muscles.
Cobalt in Foods:
See Vitamin B 12.
Prescription for Nutritional Healing, Fifth Edition: A Practical A-to-Z Reference to Drug-Free Remedies Using Vitamins, Minerals, Herbs & Food Supplements, Phyllis A. Balch CNC
The Complete Book of Food Counts, 9th Edition: The Book That Counts It All