Vitamin B12 (also known as cobalamin) is commonly found in animal-derived foods. While previous research suggested that the majority of the population consumes adequate levels of vitamin B12, recent studies suggest that many people do not absorb enough vitamin B12 to meet the recommended dietary intake and likely have marginal levels.1-3 Although the clinical implications of this are not completely clear, increased intake of B12-rich foods, or supplementation, may be warranted for certain individuals.