is there an alternative to vitamin b12 injections | B12 injections Giving vitamin B12 parenterally? 🤔

In a research setting, yes

Specifically, we are finalizing with modification our proposals to add to 180.20 definitions for tenth (10th) percentile allowed amount, median allowed amount, and ninetieth (90th) percentile allowed amount, which are values hospitals will encode when a payer-specific negotiated charge is based on a percentage or algorithm, to more accurately reflect the distribution of actual amounts that hospitals have received for an item or service

In general, most people can expect the effects of a B12 injection to last for several weeks to months

You can see the video below for a demonstration of using this area