bpc 157 vs prp injections for knee cartilage Overall, 14 of 16 patients reported pain relief. Promising human signal? Yes bpc 157 knee Injection – PRP Treatment for Skin Radiance:

But B12 supplements don't seem to have any effect on people already at normal levels

Most often, the vein selected for the procedure will be in the patients arm (just below the elbow), the back of the patients hand, or in some circumstances, in the patients foot

Any visible particles, specks, or strands mean the vial is compromised

DIRECTIONS The frequency of B12 therapy depends on the patient & individual health concerns

Further, NICE and the BNF says that if there are neurological symptoms present, then every other day injections are the recommended treatment, so all the points you make about B12 being stored and sufficient are not really relevant

Stopper Damage: Visible coring (small pieces of rubber inside the solution) from repeated punctures.