my father, 78 years old , he is vegetarian, having diabetes since 7 years undercontrolled, had a spinal surgery for cervical and lumbar spine stenosis with myelopathy 2 years back, but he has still got the burning sensation of feet and tingling sensation of the feet which is very annoying at the night time, do you suggest me to do the test for vitamin B12, B3 level , can it be the cause or i can straingt give him some calcium and vitamin B3 supplement?