It is involved in the production of brain chemicals related to mood regulation
Anyone considering BPC-157 must understand they are exploring a research-stage compound with limited human safety data, not a proven medical treatment
You don't know how Vitamin C or glycolic acid will interact with the copper peptide in your specific base
So thats the background biology
Always good to have a reason I have also had this happen when my folate was low , it may be worth you getting it checked I had self inject my B12 every 4 weeks for the last 20+ (cannot really remember how long accurately), and 2 months ago got a similar 'electric shock tingling' all over my body - head, face, arms, hands, legs, feet etc within a couple of minutes of injecting, which lasted about 3 seconds or so
Take photos every few days under consistent lighting