Vitamin B12, also known as cobalamin, is an essential water-soluble vitamin widely studied for its role in cellular metabolism, DNA synthesis, and biochemical pathways involving methyl-group transfer and cellular energy metabolism.

Laboratory research involving Vitamin B12 examines cobalamin-dependent enzymatic reactions, one-carbon metabolism, methylation pathways, DNA synthesis, amino-acid metabolism, and cellular bioenergetics. Researchers also investigate the biochemical differences among various forms of cobalamin and their roles as cofactors in cellular processes.

Vitamin B12 remains an important research compound for investigating fundamental mechanisms involved in cellular metabolism, nucleic-acid synthesis, and cobalamin-dependent biochemical pathways.