The Vitamin B12 test is a crucial blood test that measures the levels of Vitamin B12 in your body. This essential vitamin plays a vital role in the production of red blood cells, nerve function, and DNA synthesis. Deficiency in Vitamin B12 can lead to fatigue, weakness, anemia, and neurological issues. The test is often recommended if you experience symptoms like tingling in the hands or feet, memory problems, or mood changes. It’s a simple procedure where a small blood sample is drawn from your vein, and results help your doctor determine if you need dietary changes or supplementation. Early detection through this test can prevent long-term health complications.