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Influence of threonine metabolism on S -adenosylmethionine and histone methylation

Vitamin B12 supports several important functions in the body, including: DNA synthesis Red blood cell production Nervous system function Myelin production, which helps protect nerves Energy metabolism Vitamin B12 absorption becomes more difficult with age because the body may produce less intrinsic factor, a stomach protein required for proper absorption

Trial of anti-BDCA2 antibody litifilimab for cutaneous lupus erythematosus

The Myth of B12 as a Performance Enhancer The Mayo Clinic weighs in definitively on this topic: Some researchers have studied vitamin B-12 to find out if it can raise energy and endurance during exercise

Trends Endocrinol Metab 21:610618