When B12 levels are too low, some people may experience unusual sensations, particularly in the hands and feet.
These can include:
- Tingling
- Pins-and-needles sensations
- Numbness
- Burning sensations
Persistent neurological symptoms should be evaluated by a healthcare professional because prolonged vitamin B12 deficiency can cause nerve damage.
3. Difficulty Walking or Poor Balance
More advanced vitamin B12 deficiency can affect the nervous system and may contribute to problems with coordination.
Some people may notice:
- Unsteady walking
- Poor balance
- Frequent stumbling
- Feeling less coordinated than usual
These symptoms can also have many other neurological causes, so medical evaluation is important.
4. Memory Problems or Difficulty Concentrating
Some people with vitamin B12 deficiency report changes in their ability to think or concentrate.
Possible symptoms include:
- Forgetfulness
- Difficulty concentrating
- Mental fog
- Trouble staying focused
However, these symptoms are not specific to B12 deficiency. Stress, poor sleep, depression, thyroid problems, and other health conditions can produce similar effects.
5. Pale or Slightly Yellow Skin
Vitamin B12 deficiency can contribute to a type of anemia called megaloblastic anemia.
When red blood cell production is affected, a person may develop pale skin.
In some cases, the skin or whites of the eyes may also take on a slightly yellow appearance because of changes involving abnormal red blood cells.
