The effects of VIP on mucus secretion in humans are complex as an inhibitory effect of VIP on cholinergic-mediated mucus secretion in human submucosal glands has been reported [115]
Comparative copper-peptide research GHK-Cu is one of several copper-binding peptides studied in research, with AHK (Ala-His-Lys-Cu), various histidine-containing copper-binding peptides, and longer copper-binding peptide motifs (including the N-terminal albumin copper-binding site sequence DAHK and related sequences) all appearing in the broader literature
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A few small human studies suggest possible skin benefits, but sample sizes were modest and long-term safety data are absent
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The review classifies the substance explicitly as a long-acting amylin analogue for obesity research D'Ascanio et al., 2024