ghk-cu mechanism of action review Figure 3 from GHK – Copper Peptide in Skin Remodeling and Anti-Aging ! GHK- Cu in Skin Remodeling GHK-Cu - Peptide for Collagen,
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Notably, all patients had previously been treated with pentosan polysulfate, which is currently the only FDA approved treatment for interstitial cystitis, and had not responded

Both have their place, and they are not mutually exclusive
I am now slowly starting to introduce it back in

Medications with narrow therapeutic windows (like warfarin, levothyroxine, or certain diabetes medications) may need dose adjustments when combined with semaglutide