- deficient, some people experience difficulty concentrating, forgetfulness, or problems thinking clearly.
These symptoms are not specific to B12 deficiency. Stress, poor sleep, depression, medication effects, and numerous medical conditions can also affect memory and attention.
If cognitive changes persist or interfere with daily life, speak with a healthcare professional rather than assuming that taking a supplement will solve the problem.
- A Sore, Red, or Smooth Tongue
Changes inside the mouth can sometimes provide an important clue.
A vitamin B12 deficiency may cause glossitis, an inflammation of the tongue. The tongue
