Although some people feel they can trace their shoulder pain back to a clear cause an injury, for example most shoulder pain is due to normal wear and tear over years of use (or misuse), internal inflammation, or other underlying issues
In practical terms, products sold under the name DSIP are typically marketed as research chemicals , not as approved or compounded medications which means there is no approval-backed assurance of identity, purity, dosing, or clinical appropriateness, and significant sourcing risk
In biochemical and cellular research, GHK-Cu is widely studied for its role in peptidemetal interactions, extracellular matrix signaling, copper-dependent molecular regulation, and cellular communication pathways
If you're getting a cyanocobalamin (also present in oral and sublingual B12) that's more likely to cause negative reactions