Taking additional B12 hasnt been found to be of benefit, Dr
Retrieved May 3, 2025, from (Notes that riboflavin is a key coenzyme in energy metabolism
Route of administration: It is given by two routes, subcutaneous or intramuscular
These two delaying factors are why patients with low B12 levels are often prescribed B12 shots instead of oral supplements
[73] [74] [75] It is synthesized by some bacteria in the gut microbiota in humans and other animals, but it has long been thought that humans cannot absorb this as it is made in the colon, downstream from the small intestine, where the absorption of most nutrients occurs
Common side effects include injection site reactions, gastrointestinal disturbances, headache, and chromaturia