injections of vitamin b12 are given in the treatment of Benefits of Vitamin B12 Shots

Cons: Low absorption (1020%) means you often need significantly higher doses to achieve comparable injectable effects

There's limited evidence that doses above 600mcg provide additional benefit

The use of certain medicationssuch as isoniazid or drugs that interfere with vitamin absorption or metabolismmay increase the risk of B-vitamin deficiency, as assessed by a physician

But, like every medical intervention, vaccines are not without potential side effects, and monitoring these is an important part of guaranteeing vaccine safety

Its best to follow your health practitioners or naturopathic doctors instructions regarding the usage of these injections