Metformin side- effects question

I hope that when I go old I will be keeping on answering myself also questions like you do! When you lose interest to learn it is really sad. There have been different explanations about which is the exact mechanism that leads to metformin induced vit B12 deficiency but I will explain to you the one that has been recently considered the most important: Vit B12 (cobalamin), of which the principal source is animal proteins, enters our body and links to IF (intrinsic factor) produced in the stomach. The complex VitB12-IFI travels in our bowels until the terminal ileum (the area which the vitamin will be absorbed) . To be absorbed (which means enter the cell) is necessary to use the help of an