Vitamin B12 deficiency is characterized by megaloblastic anemia. This can cause:
- Weakness
- Fatigue
- Difficulty concentrating
- Irritability
- Headaches
- Heart palpitations
- Shortness of breath
- Neurological changes (e.g. numbness and tingling in the extremities)
- Balance difficulties
- Depression
- Poor memory
- Dementia
- Mouth sores
- Blurred vision
Early diagnosis and intervention is important to avoid irreversible damage associated with neurological symptoms of vitamin B12 deficiency.