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Deepening sleep: they affect the brain centers, stimulating the onset of a deeper, more restorative phase of sleep

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Safety depends entirely on clinic medical registration, doctor credentials, product quality, and proper dosing

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Cyanocobalamin injections, though less commonly used in the UK than hydroxocobalamin, can similarly raise serum concentrations

References Matrixyl: a new peptide in the cosmetic treatment of the photoaging The effect of tripeptide-1 on wound healing and collagen synthesis Copper peptides for the treatment of aged skin Palmitoyl-Lys-Phe-Lys-Lys-NH(2): a new synthetic peptide with anti-aging properties