ghk cu chemical formula File:GHK Copper.svg RCSB PDB - 6QUG: GHK

An intramuscular injection contains vitamin B12 only

Stable gastric pentadecapeptide BPC 157: novel therapy in gastrointestinal tract. Current pharmaceutical design 17.16 (2011): 1612-1632

Also it's worth noting that if you have blood work conducted and it returns as falling within "the normal range" then know that "normal" does not equal optimal and therefore, if you do suffer any of the symptoms noted above with "normal levels" then you may well benefit from the extra boost

This triggers broken immune tolerance: Overactivated innate immune cells secrete pro-inflammatory cytokines, CD4 + T cells skew toward pro-inflammatory subsets (T-helper 1 [Th1] cells/Th17), T regulatory cell (Treg) function is impaired, and autoantibodies exacerbate inflammation