Because on a molecular level, you are
22,23 In patients with a normal or low-normal serum vitamin B 12 level, complete blood count results demonstrating macrocytosis, or suspected clinical manifestations, a serum methylmalonic acid level is an appropriate next step 1,2,6,18 and is a more direct measure of vitamin B 12 's physiologic activity
However, when present in excess, it disrupts redox homeostasis and catalyzes the propagation of ROS, leading to OS [130]
69 , S4S9 (2014)
They are a great option for those who suffer from a vitamin B12 deficiency or just want to improve their overall health, especially in those who are unable to consume enough vitamin B12 through diet alone or who wish to experience the benefits much more efficiently as intravenous vitamins ensure that the entirety of what is injected into the body is able to be used, unlike consuming vitamins which are not 100% absorbed into the body
Vitamin B12 contributes to the health of your bodys nerves, blood cells, and DNA