Its not only potentially not as effective, but could be downright dangerous depending on the ingredients in the knockoff
Synergism between oxidative stress and inflammation: Evidence from animal models Inflammation can be caused by a diverse set of factors associated with Western culture, including chronic psychological stress and biome depletion (Figure 1), which at first glance might seem unrelated to inflammation
K.RatherP
BPC 157 activated the Src-Cav-1-eNOS signal pathway and reduced eNOS/Cav-1 binding in vascular endothelial cells It is known that phosphorylation of Src can promote Cav-1 activation and subsequent endocytosis of tyrosine kinase receptors and eNOS activation 20,24
Between those two resources, you should be able to get a good handle on how to find a good brand as well as some personal recomendations.
When taken orally, glutathione must go through the digestive process, which can limit the amount absorbed into your bloodstream