Now Methyl B-12 helps prevent symptoms of neuropathy such as irritability, memory loss, inattention and mild depression. Vitamin B-12 is necessary for the production of energy from fats and proteins and is well known for its critical role in DNA synthesis as well as homocysteine ​​metabolism. Methylcobalamin is the co-enzyme form of vitamin B-12 that has been found to be especially critical in maintaining a healthy nervous system.