Scientists Just Found a Major Problem With Vitamin B12 Guidelines And Your Brain Might Be at Risk Vitamin B12 plays a crucial role in your nervous system, blood formation, and energy levels When levels are too low, your body sends warning signals you shouldn't ignore. Common symptoms of 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 The Link Between Vitamin Deficiencies and Neuropathy: Houston Neurological Institute: Neurology Specialists