Seven Sneaky Signs of Vitamin B12 Deficiency

Vitamin B12 deficiency can develop slowly over years, with symptoms that are easy to dismiss. Unexplained fatigue, tingling in hands and feet, balance problems, brain fog, sore tongue, breathlessness and vision changes are key warning signs. Because the body stores B12, nerve and brain symptoms can appear even when blood counts look normal, so persistent changes warrant a doctor's blood test.