4. Strange sensations have developed
Vitamin B12 does several important things for the body, including protecting the nerves and how they function. If you are low in B12, there’s a very good chance that you could sustain nerve damage. If this happens, you might start to notice that you are experiencing strange sensations.
Many people who are deficient in vitamin B12 have claimed that they feel like there is a mild current of electricity coursing through their bodies, or that they experience pins and needles or numbness, particularly in their extremities.
If you notice strange sensations, check in with your doctor.