Billingshurst Do you follow a vegan diet? Did you know that vitamin b12 is mainly present in animal based products so those following a strict plant based are more likely to be deficient Do you follow a vegan diet? Did you know that vitamin b12 is mainly present in animal based products so those following a strict plant based are more likely to be deficient in vitamin B 12 Shots Vitamin B 12 Shots NOW Vitamins and Supplements Vitamin B12 Sources Absorption Supplements & Deficiency