swings.
6. Mood swings or depression
A deficiency in B12 can cause mood swings, irritability, or depression. B12 is important for the production of serotonin, a neurotransmitter that regulates mood.
7. Shortness of breath or dizziness
People with B12 deficiency may feel short of breath or dizzy even during simple activities. This happens because a lack of B12 can
Signs of vitamin B12 deficiency are ignored
