Scroll down to see some of the signs & symptoms that a vitamin B12 deficiency can cause in the CHEST & UPPER LIMBS areas of the body.

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To see the possible signs & symptoms of other areas of the body just click on the appropriate button on the diagram below.

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Symptoms underlined and highlighted in the same colour as their body area can be clicked on to see documented and peer reviewed sources of information.

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Because neurological symptoms of vitamin B12 deficiency can cause irreversible damage if left untreated, we have also indicated which of the symptoms are neurological by putting this (N) next to them.