Nature's Own Vitamin B12 Sublingual As Meth. Our sublingual Vitamin B12 is at a higher potency of 500µg per tablet, & beneficially in the form of Methylcobalamin, & hence is universally bio-effective & ideal for vegetarians & vegans. Sublingual Vitamin B12 provides greater absorption as it avoids the problems associated with digestive tract uptake. Sublingual Vitamin B12 provides greater absorption & uptake in the body when compared to an ordinary tablet form The human body’s absorption of vitamin B12 appears to decrease with age & therefore low levels of vitamin B12 are more likely to be identified in people over 50 Vegetarians & Vegans are also at risk of vitamin B12 deficiency as the vitamin is mainly found in animal based foods such as meats & offal