Because B12 plays an important role in nerve function, a deficiency can affect coordination, balance, and muscle strength. This can lead to difficulty walking or a “wobbly” gait.
5. Memory problems or cognitive decline
B12 deficiency has been linked to memory problems, difficulty concentrating, and in more severe cases, even cognitive decline or dementia. It can impair mental clarity and lead to confusion or mood 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 impair red blood cell production, leading to anemia and improved oxygen levels.
8. Glossitis (swollen, inflamed tongue)
A B12 deficiency can cause the tongue to become sore, swollen, smooth, and inflamed. This is called glossitis and often leads to difficulty swallowing or speaking.
9. Vision problems
In some cases, a B12 deficiency can affect the optic nerve, causing vision problems such as blurred or double vision due to nerve damage.
10. Digestive problems
A B12 deficiency can cause digestive problems such as nausea, diarrhea, constipation, or loss of appetite.
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