What to Know If You're Considering B12 Shots

3. What Are the Signs of a B12 Deficiency?

A B12 deficiency often presents with symptoms such as neurological problems, decreased motor function, and problems with balance. One of the most common signs of low B12 levels is pernicious anemia. This condition occurs in people who have trouble absorbing B12, which causes a low red blood cell count. In adults, some of the symptoms include irritability, motor problems that lead to difficulty walking and eating, depression, brain fog, mouth ulcers, weight loss, and digestive problems. In infants and young children, pernicious anemia and low B12 can cause developmental problems.