Conversely, some studies show that a deficiency in vitamin B12 may cause appetite loss, potentially leading to weight loss if left untreated ( If youre low or deficient in B12, your healthcare provider will likely recommend oral vitamin B12 supplements or injections to increase your blood levels ( summary Low levels of vitamin B12 can cause megaloblastic anemia, which is characterized by shortness of breath, headaches, and fatigue
While B12 is important for overall health and energy, it's not typically the go-to for intentional weight gain
Your body is able to absorb between 15% and 97% of the B12 vitamin from the injection without snags or additional hindrances
However, those with digestive problems like Celiac Disease require a Vitamin B12 injection
Any problems with the small intestine can complicate this final step
Administration methods include intramuscular (IM) and intravenous (IV) injections