Several factors influence the appropriate dose of vitamin B12, including the severity and underlying cause of your deficiency, your age, overall health status, and your bodys ability to absorb vitamin B12 from food or oral supplements
Vitamin B12 plays a key role in many bodily functions, like making red blood cells and supporting the nervous system
Lebers Disease: People with Lebers disease, a rare inherited eye condition, should avoid vitamin B12 injections
High doses of vitamin B12 may be harmful in people with certain types of liver disease, such as liver failure
However, research performed by doctors explains that when people can properly absorb and store vitamin B12, it is stored within the body for between 3 to 5 years
When this happens, the body tends to malfunction, although the effects take time to show