'Methylcobalamin circulates through the bloodstream and is one of two naturally-occurring coenzyme forms of vitamin B12 that the body utilizes. Adenosylcobalamin is the other form sometimes used in the dietary supplement industry. The body needs B12 to convert homocysteine to methionine, protect DNA and RNA, support energy, protect nerve and brain cells, stimulate serotonin production, contribute to red blood cell formation, support immune function, and maintain a positive mood.'
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