The thigh is best and most advisable for anyone who is self-administering a B12 shot
Vitamin B12 plays a vital role in supporting energy production, maintaining healthy nerve function, and forming red blood cells
The best approach depends on whether the goal is growth/maintenance or injury recovery
It's entitled Protocols An Operating Manual for the Human Body
Duarte-Silva S, Neves-Carvalho A, Soares-Cunha C, Silva JM, Teixeira-Castro A, Vieira R, et al
Clients often describe: Physical exhaustion, even after sleep Brain fog or trouble concentrating Mood swings or anxiety Tingling in fingers or toes Headaches or light-headedness Pale skin or brittle nails Sometimes its subtle like feeling off, or noticing that your motivation is missing