Can low B12 be a sign of cancer?

Yes, low vitamin B12 levels can sometimes be a sign of cancer. While vitamin B12 deficiency is commonly caused by dietary insufficiencies or malabsorption issues, it can also be associated with certain cancers, particularly those affecting the digestive system. These cancers might impact the body’s ability to absorb nutrients, including B12, from food. However, B12 deficiency alone is not a definitive sign of cancer; it’s important to consider other symptoms and consult a healthcare provider for a comprehensive evaluation.