Sr.B12 test @ "diagnosticcentrepune.in" A vitamin B12 test measures the amount of vitamin B12 in the blood. The body needs this B vitamin to make blood cells and to maintain a healthy nervous system. Vitamin B12 is found in animal products such as meat, shellfish, milk, cheese, and eggs. You can do this test at Glovision Diagnostics. Glovision Diagnostics Best Diagnostic Services Digital X RAY Sonography Centre Pathology