how to give vitamin b12 injection im injections livestrong.com is essential for DNA synthesis, red blood Choosing the Right Needle and

For example, testing one or both of the functional measures of vitamin B12, MMA (methylmalonic acid) and homocysteine, perhaps especially when values are in that so-called grey zone between 150 and 300 pmol/L or so

However, B12 shots can lead to side effects including: - Headache - Dizziness - Diarrhea - Skin rash and itching - Nausea and vomiting - Fatigue - Swelling and tingling sensation Additionally, excess vitamin B12 can also result in rare but severe allergic reactions also known as anaphylaxis

Vitamin B12 is absorbed through the digestive tract

Animal data is more robust

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Vitamin B12 is water-soluble, and the body excretes excess amounts through urine rather than storing supraphysiological levels