بی12 (Vitamin B12) is a water-soluble vitamin that plays a crucial role in the formation of red blood cells, DNA synthesis, and the proper functioning of the nervous system. It is primarily found in animal products such as meat, fish, eggs, and dairy. Vegetarians and vegans may need to consider supplements or fortified foods to meet their B12 needs. A deficiency in بی12 can lead to serious health issues, including anemia, fatigue, and neurological problems. The body absorbs B12 through a complex process involving intrinsic factor, a protein produced in the stomach. Regular intake of this vitamin is essential for overall health and well-being.