Biomed Pharmacother 111:765777
Even experienced copper peptide users benefit from introducing 4% products slowly, perhaps every other day initially, then building to daily use as skin demonstrates consistent positive response without signs of irritation or sensitivity

In a 1992 study in rats, the major finding was that intraperitoneal DSIP injection increased the concentration of substance P a neurotransmitter positively correlated with the regulation of anxiety and mood15 in the hypothalamus, suggesting to the researchers that the peptide sharply decreases the classical manifestations of stress.16 Earlier studies in humans, namely a series of five trials published in 1983, came to similar conclusions, with better relaxation and apparently improved tolerance against psychic stress reported by the subjects.17 Its possible that the improved stress and anxiety markers were consequent to DSIP-associated sleep enhancements.18 Substance use recovery A study from 1984 published in European Neurology describes DSIPs potential use as a treatment for alcohol and opiate use disorders
The peptides unique ability to bind copper ions enhances its biological activity, as copper serves as a cofactor for numerous enzymes essential to skin health and wound healing
G., Jung, I., Suk, J., Lee, H., Kim, U., & Lee, J