bpc 157 how often to use injection BPC-157 Dosage: A Complete Guide – Dr. Rogers Centers BPC-157 Dosage Protocol: Injection Guide
Description
Clin Endocrinol (Oxf) 69:894900

Rotate between left and right shoulders, or between gluteal quadrants, with each injection to prevent tissue damage and fibrosis

It could also be due to the adipocyte dysfunction linked to low vitamin B12 levels through cellular inflammation
The 23G to 25G (gauge), 1-inch needle is the most common size for general injections
