For overall skin antiaging, firmness, and repair, GHK-Cu is generally considered the gold standard because its better researched and consistently improves collagen, wound healing, and visible skin quality
Indeed, UBX0101 treatment on aged mice with post-traumatic OA after surgery reduces the presence of senescent cells, improves articular cartilage, and upregulates the expression of genes involved in new cartilage growth 25
Normal copper metabolism should handle the small amounts in GHK-Cu doses, but this test provides the safety check
Journal of Alternative and Complementary Medicine, 17 (9), 827833.
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The copper peptide uglies typically manifest as: Increased breakouts (microcomedones being pushed to the surface faster) Temporary redness or irritation A rough, uneven texture Skin that looks "tired" or dull for a few weeks If this is true purging, it should resolve within four to six weeks, which aligns with your skin's natural renewal cycle