glutathione absorbed orally Oral – Naples Center for Functional Medicine Oral delivery of glutathione: antioxidant

PMID 1685472

Most current evidence is pre-clinical

The GHK-Cu peptide is used in laboratory research to study a wide range of biological mechanisms, including collagen and glycosaminoglycan synthesis, wound healing signaling, antioxidant gene activation, and copper-dependent cellular processes

ACS Omega Am Chem Soc (2023) 8:2098799

Quinlan et al., 2013), complex I and complex III (Venditti et al., 2013) have been shown to be the most important sources of mitochondrial superoxide generation, although significant production of ROS in complex II has recently also been reported ( FIGURE 2 The primary ROS produced by the ETC is superoxide, a free radical with moderate reactivity, whose generation can lead to more reactive or secondary ROS derivatives