Vitamin B12 Deficiency: Signs & Symptoms Vitamin B12 is essential for nerve health, red blood cell formation, and brain function. When B12 levels are low, symptoms often develop slowly and silently, Your body needs vitamin B12 to keep blood cells healthy and to make your nerves work right. But what happens when you run low? Here are some signs: https: wb.md 3OUOc1J Peripheral Neuropathy: Symptoms, Causes, Diagnosis, and Treatment My b12 levels are now great but i still suffer numbness : r B12_Deficiency