Vitamin B12 injections are a common treatment for vitamin B12 deficiency. Vitamin B12 is an essential nutrient that is involved in a number of important bodily functions, including the production of red blood cells, the synthesis of DNA, and the functioning of the nervous system. Vitamin B12 deficiency can lead to a variety of health problems, including fatigue, weakness, anemia, and neurological problems.
Vitamin B12 injections are typically given intramuscularly, meaning they are injected into a muscle. The most common injection site is the deltoid muscle in the upper arm. Vitamin B12 injections are usually given once a month, but the frequency of injections may vary depending on the severity of the deficiency.