why does my arm hurt after b12 injection What If Shoulder Hurts a Vaccine Shot? Why does my arm hurt

Some clients come weekly, while others schedule injections monthly for ongoing support

Both types impair the delivery of oxygen and nutrients to body tissues

How Gastric Banding Affects Vitamin B12 Absorption Gastric banding leaves the B12 absorption pathway anatomically intact, so deficiency is driven by dietary restriction and PPI use rather than surgical bypass

Application: Injection Sites : Common sites for IM injections include the deltoid muscle (upper arm), the gluteus maximus (buttocks), and the vastus lateralis (thigh)

Some protocols split the daily dose into morning and evening injections

Injections are clearly superior when absorption is impaired, such as in pernicious anemia or after gastrointestinal surgery