how to inject vitamin b12 injection self-inject intramuscular - Overview Best Vitamin B12 Injection Sites:

Its a scientifically established standard for safety and efficacy

Before taking, speak with your doctor if you are allergic to vitamin b12, have a genetic condition called optic atrophy, have blood in your urine, polycythemia, an ongoing infection, low iron or folate levels, are pregnant or plan to become pregnant, are breastfeeding or plan to breastfeed

This is often called a loading dose phase, and its purpose is to quickly raise the B12 levels in your body and help you start feeling better

Since everyone biology varies, trying both peptides at different times can help identify which works better for a specific person