Introduction Vitamin B12 is an essential nutrient that plays a major role in nerve function, red blood cell formation, and DNA synthesis. Despite its importance, Vitamin B12 deficiency is very common—especially among vegetarians, older adults, and people with digestive issues. The biggest problem? Its symptoms are often silent or mistaken for everyday fatigue. Why Vitamin B12 Is Essential Vitamin B12 helps keep your nervous system healthy and supports proper brain function. It is also required to produce healthy red blood cells, which carry oxygen throughout your body. Without enough B12, your body and mind begin to slow down. Common Symptoms…