According to a While B12 shots are necessary for some people who cannot absorb the vitamin in other ways, they have some risks and side effects
The dose of vitamin B12 shots depends on how bad the deficiency is and the type of B12 used
Vitamin B-Complex Injection can be given either intramuscularly (IM), usually into a large muscle like the upper outer buttock (gluteal muscle) or thigh, subcutaneously (SQ) or sometimes intravenously (IV) as a slow injection in a clinical setting
[20] For nutritional deficiency without intrinsic-factor loss, shorter courses-such as 30-100 mcg intramuscularly daily for five to ten days followed by 100-200 mcg monthly-are often sufficient
It is one of the vitamins necessary for the body: The primary role of multivitamins is to fill nutritional deficiencies and ensure that people get their daily allowance of nutrients they don't get enough of
Furthermore, the risk of an allergic reaction is typically lower with oral supplements than with injections