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Q6: How does GHK-Cu compare to other anti-aging peptides

The peptide appears to modulate sleep quality improvement through interactions with multiple neurotransmitter systems including GABAergic, serotonergic, and dopaminergic pathways that regulate sleep-wake transitions

PubMed 22962027 TB-4 Phase 1 human safety first-in-human randomized, double-blind, single- and multiple-dose Phase 1 of recombinant human thymosin 4 in healthy volunteers, no serious adverse events: PubMed 34346165

This combination is common and allows you to target both systemic and skin-specific benefits simultaneously

The combination of GHK-Cus collagen and anti-inflammatory signaling with PDRNs DNA repair and cellular proliferation pathway produces a broader repair stimulus than either active delivers post-microneedling independently