how long after b12 injection blood test Does It Take for Injections to Work? How Long Does a B12

Since nitrous oxide is commonly used for surgery in the elderly, some experts feel vitamin B 12 deficiency should be ruled out prior to its use or prophylactic vitamin B 12 supplementation implemented before and after exposure to the gas (7, 18)

doi:10.1007/s00467-017-3663-y [56] Rhee CM

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Initially, frequent injections may be required to build up a sufficient store of vitamin B12

Be sure to record your injection dates, sites used, and any reactions

Policy Vitamin B12 deficiency, sometimes called cobalamin deficiency, happens when your body is either not getting enough or not absorbing enough vitamin B12 from the foods you eat