Methyl B-12 10,000 mcg, 60 Lozenges, NOW FoodsNOW Foods Methyl B 12 10,000 mcg Dietary Supplement. Nervous System Health. 10,000 mcg Methylcobalamin. Vegetarian Vegan. 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 in homocysteine metabolism. Methylcobalamin is the co enzyme form of Vitamin B 12 that has been found to be especially critical in the maintenance of a healthy nervous system. Dietary