b6 b12 injections benefits of - Clinic Poster Vitamin Injections Explained: Benefits, Process
Description
doi: 10.1038/s41598-020-67832-7

A minimum cycle of 12 weeks is recommended, with 16-24 weeks being common for advanced users

Keep the pen cap on until you are ready to inject under the skin of your stomach, upper arm, or thigh
they act like sponges, absorbing and removing the neurotransmitters from the synapses

The Vitamin Bs are also imperative for brain function and development, so may help improve memory, focus and overall cognitive function

You can dive into the research on pernicious anaemia's prevalence here
