How does a Vitamin B12 deficiency impact the nervous system?

A long-term Vitamin B12 deficiency can severely affect the nervous system, leading to nerve damage or neuropathy. Symptoms of nerve damage include numbness, tingling in the hands and feet, balance issues, and even cognitive problems such as memory loss and difficulty concentrating. This is because Vitamin B12 plays a key role in maintaining the health of the myelin sheath, which surrounds and protects nerves.