b12 injections not working Feeling worse after Injection: Answering concerns B12 Shots for Weight Loss:

Some occur naturally in the body, while others are synthetic compounds designed to mimic natural biological signals

In the United Kingdom, the Reference Nutrient Intake (RNI) for vitamin B12 is set at 1.5 micrograms (mcg) per day for adults aged 15 years and over, as established by the Department of Health's Committee on Medical Aspects of Food Policy (COMA)

Just one of the thousands of reasons the body stores vitamin B12 is because it is necessary for the development of appropriately sized red blood cells, which are essential in reducing the risk of Pernicious Anemia and other ailments that wed all rather avoid

If clinical suspicion remains, targeted HIV enzyme-linked immunosorbent assay (ELISA) and hepatitis C serology (HCV Ab, HCV RNA) could be considered

Always follow the COA and confirm by analytical QC