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The relative susceptibility of individual ECM proteins to degradation may be determined not only by their longevity but also abundance, tissue location (for example in the ultraviolet radiation [UVR]-exposed papillary dermis of photoaged skin (Watson et al., 1999)) and biochemistry (where amino acid composition mediates susceptibility to UVR and oxidation (Hibbert et al., 2015))

Research-grade BPC-157 is classified for laboratory use

1-3 Glutathione is also involved in the metabolism of certain compounds that can increase free radical activity

Lpez-Len, Joaqun Pardo, M

That small addition is what gives it its name and its unique function