Vitamin B12 Sublingual X 60 TabletsBioactive methylcobalamin (500g) and adenosylcobalamin (500g) forms of Vitamin B12 suitable for sublingual absorption. Vitamin B12 is naturally found in fish, dairy produce, organ meats, beef, and pork. This means that vegetarians and vegans often choose it as a regular supplement. Specifically Vitamin B12: Contributes to the reduction of tiredness and fatigue. Contributes to the normal function of the immune system. Contributes to normal energy