does vitamin b12 injections have any side effects Injections: What You Need To Know Are Vitamin B12 Shots Right

This is believed to result from the increased blood volume induced by methylcobalamin

Shots of vitamin B12 are often given in doses of 1,000 mcg/mL, while vitamin B12 pills often come in capsules, tablets, or soft gels of 50 to 5,000 mcg

According to the NIH Office of Dietary Supplements, B12 plays a key role in: Making red blood cells and preventing megaloblastic anemia Maintaining healthy nerve function and the myelin sheath that protects nerves DNA synthesis Supporting brain function and preventing cognitive decline Converting food into energy (cellular metabolism) Because B12 is found almost exclusively in animal products meat, fish, dairy, and eggs certain groups of people are at much higher risk of deficiency than others

They might ask for blood tests, such as ferritin, hemoglobin, and transferrin saturation