As the However, while risks of severe toxicity are low, some side effects are still possible, such as: temporary symptoms, such as itching, swelling, or diarrhea allergic reaction damage from the injection hypokalemia, or low potassium levels infection negative interactions with certain medications, such as: metformin (Fortamet, Glucophage, Riomet) medications to reduce gastric acid, such as proton pump inhibitors or H2 receptor antagonists Always talk with a doctor before using vitamin B12 supplements
Two common forms of B12 injections are cyanocobalamin and hydroxycobalamin, which are both synthetic forms, while methylcobalamin is the naturally occurring, active form the body uses most readily
Choline prevents cholesterol buildup
Reusing the same spot leads to lumps, bruising, and slower absorption