Vitamin B12 is stored in the kidneys, liver and other bodytissues and as a result, the signs and symptoms of vitaminB12 deficiency may not show themselves until 5-6 years ofpoor dietary intake. The classic symptom of vitamin B12deficiency is anemia; however it appears that a deficiencywill affect the brain and nervous system first. This can leadto impaired nerve function such as a feeling of numbness,a pins and needles sensation as well as mental function.