When administered by qualified healthcare professionals, in a controlled clinical environment, IV vitamin therapy is perfectly safe
It also allows for personalized treatment that suits the individual
Symptoms requiring immediate medical attention include difficulty breathing, facial swelling, or widespread urticaria
This can make it harder for them to absorb and use vitamin B12
So, if you're feeling unwell due to a deficiency, restoring B12 levels might help you feel well enough to eat normally, but it's not "making" you gain weight in an unhealthy way
A vitamin B12 deficiency can not only diminish your ability to lose weight, but it can lead to many serious health issues, some of which are irreversible, so if you are having or have had problems with your gut, are older in age, or follow a specialized or restrictive weight loss diet, dont hesitate to get tested.