b12 injection very painful What happens if you inject wrong? Why Do I Feel Worse
Description
It is marketed as a peptide because it is sold alongside them, but chemically it belongs to a different family entirely

No IGF-1 elevation: Avoids risks of acromegaly or unwanted tissue growth

What Happens When a B12 Shot Is Administered Incorrectly

BPACNZ: Dunedin, New Zealand, 2011 [30 September 2013]