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Environ Toxicol 35(6):683
If the GHK-Cu has lower-than-stated purity or incomplete copper complexing, the actual administered dose and the active complex differ from the calculated values, compromising research validity
If you have a medical condition or are taking medications, consult with your healthcare provider before starting any new supplement, including glutathione
Some individuals may experience mild skin irritation or redness at the application site
Note: IM administration may cause tenderness and swelling
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