Simkens LH, van Tinteren H, May A, ten Tije AJ, Creemers GJ, Loosveld OJ, et al
Copper peptide GHK-Cu, also known as Copper tripeptide-1, is widely used in anti-aging cosmetics, and several controlled facial studies have shown its anti-aging, firming, and anti-wrinkle properties
[It] has better absorption and is more likely to survive the enzymes in the gut that break it down and prevent absorption, said Lee
You can read every one
Nevertheless, the authors posited that local, tissue-level IGF-I production in targets such as skeletal muscle cells might still be modulated, even if overall IGF-I remains relatively stable
We synthesize all our peptides through small-batch production with exact amino-acid sequencing, guaranteeing unparalleled purity and consistency