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Dick P, Grandjean ME, Tissot R

the peptide has the potential to induce a wide range of responses from growth stimulation to toxic cell differentiation

When a supplement is manufactured without strict quality controls, it may contain fillers, synthetic binders, or heavy metal contaminants that irritate the body

In addition, researchers continue to investigate its influence on immune cell function, inflammatory signaling, and cellular communication, making glutathione an important research tool across immunology and regenerative biology

FDA materials flag compounded injectable GHK-Cu as a safety concern because of limited human safety data, aggregation risk, peptide-related impurities, and possible immunogenicity [8]

New England Journal of Medicine