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Does a Vitamin B12 Injection Hurt

Malabsorption (insufficient absorption of vitamin B12 in the intestine) due to insufficient production of intrinsic factor (a protein produced in the lining of the stomach that is needed to absorb vitamin B12), disorders in the end section of the ileum (part of the small intestine), such as sprue, fish tapeworm infestation or blind loop syndrome (change in the course of the intestine after gastric surgery)

Use a 45-degree angle with a skin pinch when subcutaneous fat at the site is limited

Who Should Avoid It Pregnancy or breastfeeding WADA prohibited - athletes subject to testing must avoid Stop Right Away If You Notice Severe injection site reactions or infection signs Unusual swelling or persistent redness Allergic reactions (rare) Any concerning or unexpected symptoms Milder Signs to Watch For How Long Should a AOD-9604 Cycle Last