Nature’s Own Sub-Lingual Vitamin B12 has 500mcg of Vitamin B12 per tablet and is in the form of Methylcobalamin. The tablets are sub-lingual, providing greater absorption as the tablets quickly dissolve in the mouth, and so avoids any digestive tract uptake problems. Vitamin B12 is important as it contributes to normal energy metabolism, normal red blood cell formation, normal function of the immune system and normal energy yielding metabolism.