Pouran Faghri is an Adjunct Full Professor in the Department of Environmental Health Sciences at the Fielding School of Public Health, University of California, Los Angeles
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
Patients with significantly elevated calcitonin levels or progressive increases should be referred to endocrinology for specialized evaluation
for the related NAD+ research, see NAD+ and Sirtuins
Lindschinger, M., Tatzber, F., Schimetta, W., Schmid, I., Lindschinger, B., Cvirn, G., Stanger, O., Lamont, E., & Wonisch, W