This may be due to copper's ability to enhance the expression of metalloproteinases (MMPs).16 MMPs normally regulate the degradation of collagen, and a specific one, MMP-1, may be responsible for the initiation of collagen fragmentation.17 Supporting this, a 2024 study noted that elevated MMP-1 levels appear to contribute to aging skin and that higher MMP-1 levels in mice led to:18 The loss and fragmentation of dermal collagen fibrils Contracted fibroblast morphology Reduced collagen production Increased expression of pro-inflammatory mediators Additionally, a 2016 study found that GHK-Cu significantly increased gene expression of MMP-1 and MMP-2 at the lowest concentration, which the studys authors considered to be one of the reasons the peptide was able to increase collagen and elastin production.19 So, what this could ultimately mean is that using too much GHK-Cu (or other copper peptides) may in theory increase the skins MMP-1 concentration above the levels involved in healthy collagen production, taking it into the collagen fragmentation and breakdown territory seen in older skin with naturally higher MMP-1 levels

Doing a patch test helps you see if a product will irritate your skin before you use it all over, especially in delicate areas like your face
Results vary from person to person and depend on factors like your age, lifestyle, diet, and exercise habits
Research on human pituitary somatotroph cells demonstrated that GHRP-6 produces potent effects on membrane phosphatidylinositol turnover
The stomach acid can break down the glutathione before it reaches the bloodstream, which is why many people do not experience significant benefits from oral consumption
Conclusion and Key Takeaways In summary, the question of whether you can take glutathione and omega-3 together is met with a positive responseyes, they can be combined safely and may even enhance each other's benefits