10 Vitamin B12 Deficiency Symptoms
Symptom #4: Pins and Needles Sensations
The most serious side effect of B12 deficiency is damage to the nerves. This could occur over time if deficiency goes on for long because vitamin B12 is an important contributor to the metabolic pathway that produces myelin. Myelin is a sheath that surrounds the nerves, and serves as protection and insulation.
When adequate B12 is lacking, myelin production is affected in such a way that the nervous system might not function properly. The most common symptom for this is paresthesia, which is the sensation of pins and needles. The symptoms associated with B12 deficiency usually occur alongside anemia. Note that this sensation is a common symptom that may also have other causes.
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