It has long been recognized that the gut microbes contribute to the vitamins needs of our body. The magnitude of this contribution in healthy individuals is immense. In the state of an imbalanced gut, this contribution is decreases. Thiamine, folate, biotin, riboflavin, and panthothenic acid are available through diet and is also synthesised by the gut flora. It has been estimated that half of the body’s daily Vitamin K requirements comes from the gut microbiota. The other interesting facet of bacteria synthesised vitamins are that their molecular structure is not identical to dietary vitamins. There are also specialized transporters that is synthesised by our body to distribute these vitamins. In all, this suggests that gut flora synthesised vitamins might have specific functions and are essential for health.