Deficiencies in vitamin B12 and folate can often have overlapping symptoms, and serum levels of these nutrients aren't all that accurate when making a diagnosis. People with B12 deficiency can experience neurological Vitamin B 12 Benefits Uses Side Effects That Face Place Methylcobalamin is the active form of Vitamin B12 that can be used as a dietary supplement injection in order to:, , 1. Increase energy levels Vitamin B12 helps to utilize fats & carbohydrates for How Long Does It Take to Recover from Vitamin B12 Deficiency? B12 INJECTIONS The Nurse Clinic