can b12 injection be given in buttocks Best Vitamin Site: Administering B12 Shots Buttock injection Vitamin b1,b6,b12 "Becobion"
Description
A 2020 study published in Environmental Research found that children and adolescents with higher vitamin B12 levels were less likely to be obese 5

Intramuscular injection leads to faster absorption, which can increase the intensity of side effects like headaches and gastrointestinal issues

But if you use the following reference numbers , you will get the ampoules you want

You can also stay longer in Cusco for hikes or in Lima for a gastronomic tour

So do your homework when it comes to B12 to see which you may tolerate best