We need more evidence to know if the pills are as effective as the shots over time, though some research suggests they work, especially when it comes to sublingual supps
The cheapest insurance against this is buying bacteriostatic water from a source that can confirm what's actually in the bottle manufacturer name, lot number, USP labeling, glass vial with metal-crimp seal, and the explicit "0.9% benzyl alcohol" line
Description Reconstitution BAC Water 0.9% is a solution containing 0.9% benzyl alcohol as a preservative
However, its important to note that the duration of benefits can be influenced by several factors, as discussed in the previous section
Not for Direct Intravenous Injection

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
