b12 injections side effects mayo clinic Feeling worse after Injection: Answering concerns B-12 (Cyanocobalamin) Shot Therapy |

As an injection (Intramuscular, IM, or Subcutaneous, SC), it is highly effective for patients who cannot properly absorb Vitamin B12 through the digestive system due to underlying conditions like pernicious anThere are no known significant interactions between injectable B12 and food, as the injection bypasses the entire digestive system

2 In pernicious anemia, the deficient levels of vitamin B12 are due to the body lacking the intrinsic factor that forms a complex with vitamin B12 which allows absorption into the gut

This means your fourth dose might come up slightly short unless you account for dead-space volume or use a low dead-space syringe

26 March 2024