Vitamin B12 deficiency: Five common symptoms to watch out for - and when to see a doctor - Express

People with undiagnosed symptoms should consider that they may have a vitamin B12 deficiency.One of the most common symptoms of a vitamin B12 deficiency is developing unusually pale skin.Vitamin B12 deficiency symptoms: The sign in your chest [SYMPTOMS].Vitamin B12 deficiency: A urinary problem could be a sign [SIGNS].Vitamin B12 deficiency - common sign you may not be noticing [SYMPTOMS]."Unfortunately, symptoms of a vitamin B12 deficiency can take years to show up, and diagnosing it can be complex.