Can long time deficiency of vitamin d and b12 be a reason of getting any auto immune disease? Can similar be the reason of having food allergy or any sort of allergy?

Suggestions offered by doctors on Lybrate are of advisory nature i.e., for educational and informational purposes only. Content posted on, created for, or compiled by Lybrate is not intended or designed to replace your doctor's independent judgment about any symptom, condition, or the appropriateness or risks of a procedure or treatment for a given person.