In rare situations, B12 shots itching rash anaphylaxis, a life threatening condition that can cause a fast heartbeat and difficulty breathing Other side effects that can occur include: shortness of breath, fast weight gain, and swelling congestive heart failure, the inability of the heart to adequately pump blood pulmonary edema, the buildup of fluid in the lungs peripheral vascular thrombosis, the obstruction of a vein with a blood clot hypokalemia, low potassium levels that can cause irregular heartbeats and muscle weakness fever tingling, numbness, and joint pain swollen tongue polycythemia, an increase in the red blood cell mass Additionally, B12 B12 shots are not necessary for weight loss
Although well done methodologically, results of these reviews have remained relatively confidential, without any real change in world practice at the beginning of the 2000's
If you want to compare a specific formula, take a look at Liposomal Glutathione, which is designed with delivery in mind
Therefore, vitamin B12 should only be injected by a health care professional who is prepared to provide first aid immediately