For someone with normal B12 levels, the benefit of routine injections for wellness is unproven, while potential harms, however small, accumulate with repeated treatment
Below that, you're paying for a compound diluted with synthesis byproducts
Compounding of unknown risks: Combining two compounds with incomplete human safety data multiplies the uncertainty considerably
Yes, a clinical review is required to determine your eligibility
Vitamin B12 can interact with medications such as colchicine (a medicine used to treat gout), metformin (an anti-diabetic agent), excessive alcohol, vitamin C products, extended release potassium products, antibiotics such as gentamicin, neomycin, tobramycin, anti-seizure medications such as phenobarbital, phenytoin, primidone, medicines used to treat heartburn like H2 blockers such as cimetidine and proton pump inhibitors such as omeprazole, antacids such as ranitidine, cimetidine
B12 injection benefits people report most often include better energy and less fatigue