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Possible Side Effects Mild injection site reaction (transient) Rare: temporary skin discoloration at injection site Very low systemic side effect profile No hormonal effects Important: GHK-Cu has an extensive safety record across decades of research in cosmetic and medical applications

293 A study in mice demonstrated that the concentration of IL-1 and TNF- in the serum of 52-week-old mice was significantly higher than that of 12-week-old mice

Links Contacts Thibault Cavali Laboratoire d'Astrophysique de Bordeaux Bordeaux, France Tel: +33 (0)5 40 00 32 71 Email: [email protected] Bilal Benmahi Laboratoire d'Astrophysique de Bordeaux Bordeaux, France Tel: +33 (0)5 40 00 32 76 Email: [email protected] Vincent Hue Southwest Research Institute San Antonio, TX, USA Tel: +1 (210) 522-5027 Email: [email protected] Thomas Greathouse Southwest Research Institute San Antonio, TX, USA Tel: +1 (210) 522-2809 Email: [email protected] Suzanna Randall (astronomer who did not participate in the study

A single composition architecture-based nanoprobe for ratiometric photoacoustic imaging of glutathione (GSH) in living mice