self administered vitamin b12 injections at Home - Safety Guide for Self-Administration Ivy Grove Surgery : Self-administration
Description
it could be 1 month, 3 months, or longer-term

Understanding each pathway helps explain why copper peptides show such promise for hair regrowth
Patient education: Explain that B12 shots usually relieve symptoms gradually it may take weeks to feel better

Its given under a doctors watch, with special rules for how its mixed and given