If you are looking into the broader category of these ingredients, you can read more about what copper peptides are and their specific GHK-Cu benefits
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Additionally, the cyclic trisulfide structure of LASSS, as opposed to the linear trisulfides such as GSSSG and cysteine trisulfide (Cys-SSS-Cys), could guarantee the unique reactivity of LASSS (see again Figure 1a for chemical structures)
Biochim Biophys Acta 1472(3):643650 Garcia-Alcantara F, Murillo-Cuesta S, Pulido S, Bermudez-Munoz JM, Martinez-Vega R, Milo M, Varela-Nieto I, Rivera T (2018) The expression of oxidative stress response genes is modulated by a combination of resveratrol and N-acetylcysteine to ameliorate ototoxicity in the rat cochlea