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[9] A 52-week double-blind RCT with 0.1% stabilized retinol showed 44% improvement in crow's feet wrinkles and 84% improvement in mottled pigmentation, with benefits still accumulating at the final time point

Originally isolated from plasma in the 1970s, GHK-Cu is endogenously present in the organism and has been suggested to decline in concentration over time

GHK-Cu: The Ultimate Skin Regenerator & Collagen Booster GHK-Cu, often called a 'copper peptide,' is my absolute favorite for promoting youthful, resilient skin

Intestinal epithelial sirtuin 1 regulates intestinal inflammation during aging in mice by altering the intestinal microbiota