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The copper peptide group showed statistically significant improvements in skin density (ultrasound), collagen content (histology), and visual wrinkle depth outcomes that exceeded both the vitamin C and tretinoin groups by week 12
PMID: 21030672
Its ability to cross the bloodbrain barrier in laboratory models, combined with a relatively long plasma half-life compared to other small neuropeptides, has contributed to its enduring relevance in neurochemistry research
Stomach acid destroys them before they reach your bloodstream
Dark Spots and Hyperpigmentation May Return: Any areas of hyperpigmentation or dark spots that were lightened with glutathione may gradually become more noticeable again
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