Yes, B12 deficiency can cause diarrhea. When the body does not have the required amount of B12, it can lead to a condition known as pernicious anemia, which is an autoimmune disorder that affects the absorption of B12 in the digestive system. Without enough B12, the body cannot properly break down and absorb the nutrients it needs from food. This can lead to malabsorption of food and nutrients, which can cause diarrhea.
In addition, B12 deficiency can also cause digestive issues such as constipation, bloating, and abdominal pain. This occurs because without enough B12, the small intestine cannot properly break down and absorb the nutrients from food. This can cause chronic digestive issues and can make it difficult for the body to absorb the nutrients it needs from food.
Finally, B12 deficiency can also lead to a weakened immune system, which can make it difficult for the body to fight off infections and can also lead to digestive issues such as diarrhea. Without enough B12, the body cannot produce enough white blood cells to fight off infections, which can lead to digestive issues such as diarrhea.
In summary, B12 deficiency can cause diarrhea due to the lack of B12, which can lead to malabsorption of food, digestive issues, and a weakened immune system. If you suspect that you may have a B12 deficiency, it is important to speak with your doctor in order to get the proper diagnosis and treatment.