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
And lets not forget the added bonus of more energy and improved overall well-being
Mood disturbances including irritability, depression, or unusual anxiety
The MHRA has issued broader warnings about the risks of purchasing unlicensed medicines and research chemicals online
Finally, select an injection site, commonly the upper arm, thigh, or abdomen, and clean it with an alcohol swab
Annals of Clinical & Laboratory Science, 45(4), 426-432