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Description
Common signs of B12 deficiency include fatigue, weakness, pale skin, shortness of breath, numbness or tingling in the hands and feet, difficulty maintaining balance, and cognitive issues like memory problems

Methionine synthase, a methyltransferase, is the main enzyme in humans that utilizes methylcobalamin as a methyl source and provides for methylation reactions throughout the body
Its a perfect example of how a seemingly minor tweak in an amino acid sequence can create a profoundly different tool for researchers

Just taking large amounts of B12 supplements does not mean that your body will be able to use all of it
