If you are over 40 and your sleep has gradually worsened with age, Epitalon is the most targeted choice because it directly addresses declining melatonin synthesis
J Chromatogr Sci 52:559565
This figure, drawn from the original plasma studies following GHK-Cus identification, has become the standard reference point in the literature whenever researchers discuss the peptides relationship to aging
For everyday supplement use, though, the real comparison is between oral formats, and that's where bioavailability, how readily an ingredient is made available to the body, comes up
Human data remains limited, and further research is needed to fully understand its mechanisms and potential applications
If you have a mild deficiency, taking Neuorbion Forte or similar supplements may help