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.
Other symptoms of anemia can include:
- Fatigue
- Weakness
- Shortness of breath
- Reduced exercise tolerance
6. A Smooth, Sore, or Red Tongue
Changes in the tongue and mouth can sometimes occur when
