Methylcobalamin - The Superior Form of B12 Supports Brain Cells and Nerve Tissue Dietary Supplement Suitable for Vegetarians/Vegans Non GMO - Non Genetically ModifiedMethylcobalamin (Methyl B-12) is better absorbed and retained than other forms of B12 (e.g. cyanocobalamin). Methyl B-12 supports nerve tissue and brain cells promotes better sleep and converts (via methylation) homocysteine, an oxidizing metabolite, back into the amino acid methionine. Also vegetarians/vegans often require B12 supplementation.