mood swings, or symptoms of depression.
7. Smooth or Swollen Tongue
A swollen, inflamed, or unusually smooth tongue can be a sign of vitamin B12 deficiency. The small bumps on the tongue may disappear, making it look glossy or red. Some people also experience burning sensations or mouth discomfort.
8. Vision Problems
In rare cases, prolonged vitamin B12 deficiency may affect the optic nerve, which carries visual signals from the eyes to the brain. This can lead to blurred or disturbed vision. While uncommon, it is a sign that should
