How long do the benefits of a vitamin B12 injection last?

How Vitamin B12 Injections Work
Vitamin B12 injections are intramuscular injections that deliver high doses of the vitamin directly into the bloodstream. This method bypasses the digestive system, allowing for faster and more efficient absorption of the vitamin.

Once in the body, vitamin B12 is used in several essential processes. It is involved in producing red blood cells, which are responsible for carrying oxygen throughout the body. It also plays a crucial role in the functioning of the nervous system, as it is needed to produce the protective covering of nerves known as myelin. Additionally, vitamin B12 is necessary for the metabolism of cells throughout the body, including those involved in energy production and DNA synthesis.

Unlike other forms of B12 supplementation, such as oral supplements or fortified foods, injections have several advantages. First, they deliver high doses of B12 directly into the bloodstream, which can be particularly helpful for individuals with absorption issues or those who have difficulty maintaining adequate B12 levels through their diet. Additionally, because injections bypass the digestive system, they are not subject to the exact breakdown and loss of potency that can occur during digestion.