METHYLCOBALAMINE VITAMIN B12 ORAL DISSOLVABLE TABLET: 30 vitamin B12 orally dispersible capsules What is Methylcobalamin B12? Methylcobalamin B12- It is the active form of vitamin B12. Vitamin B12 deficiency is generally caused by absorption problems in the stomach and intestines. Therefore, you may not benefit enough from the vitamin B12 you take as a supplement. The absorption of methylcobalamin B12 begins while chewing. It is absorbed under the tongue and mixes directly into the blood without any change. This way, you get all the B12 you need.