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The FDA also notes that no safety-related information regarding DSIP has been identified, so its unknown whether it could be harmful to humans.26 Given these conclusions, we shouldnt be surprised that DSIP is not an FDA-approved peptide therapy

References Gwyer D, Wragg NM, Wilson SL

Summary While NAC is considered safe as a prescription medication, it can cause nausea, vomiting, and gastrointestinal disturbances, as well as mouth issues if inhaled

In this study, exposure to cigarette smoke remarkably dampened Nrf2 nuclear translocation in the lungs, and GHK-Cu strongly augmented nuclear Nrf2 levels to greater than those of the control mice