What are the Symptoms of Vitamin B12 Deficiency?

Vitamin B12 is responsible for the DNA synthesis, red blood cell formation and defferent neurological processes, so some of the symptoms of B12 deficiency can be:
- tingling in the palms
- eyetwitch
- disorientation
- shortness of breath
- memory loss
- irritabilty and personality changes, etc
The first sign of B12 deficiency is anemia. If this condition goes on for to long, you can expect nausea, vomiting, diarrhea, gas, constipation and heartburn. Change of diet can help witha anemia. Only thing to consider is that B12 can only be found in products that come from animals, so that ovo-lacto-vegetarians should take B12 food supplements or vitamin pills. Food should be rich in proteins. Proteins can be found in eggs, red meat, fish, poultry and dairy. B12 can also be distributed directly by injections. Another interesting thing about B12 is that it is the most complex and largest vitamin structurally.

Source: Vitamin B12 Deficiency Symptoms