give myself b12 injections at Home - Safety Guide for Self-Administration How To Self-Inject B12
Description
Journal of Peptide Research

Always follow the instructions from your healthcare provider
Clients who receive B12 shots for energy report feeling noticeably more alert, focused, and activeoften within 24-48 hours
A deficiency in folic acid can cause a variety of hematologic complications including megaloblastic and macrocytic anemias

Its challenging to identify the exact amount as it differed across various studies
