Illustratively, it is produced in the central nervous system (i.e., brainstems raphe nuclei) (12% of the serotonin in the human body), skin (i.e., Merkel cells), lung (pulmonary neuroendocrine cells), gastrointestinal tract (90% of the serotonin in the human body) (i.e., enterochromaffin cells), and rest of 8% is stored in platelets [166]
Epithalon Side Effects At least two epithalamin trials have shown that the peptide is well tolerated with a favorable safety profile , and causes no severe adverse effects in test subjects [1]
With oral GHK-Cu, the picture changes
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doi:10.1016/j.joca.2021.01.009 Floyd ER, Rodriguez AN, Falaas KL, et al